Despite the numerous owners on here experiencing this problem mutiple times over and over again without solution ( see this thread for example http://www.dieselplace.com/forum/showthread.php?t=84796&highlight=my+squeaky+belt+saga ) my service manager just left me a voicemail in response to my latest complaint ( my 4th time having this issue after 3 prior visits to my dealers service department ) saying that according to the GM tech line this is NOT a problem and that they have only heard of it ONE other time.:confused:
He also said that according to GM , there is no proposed fix for it.
My service manager has been working very good with me, but I believe this to be out of his control at this point.

So for those of you that now have, or have had the "squeaky belt " at start up problem, please post up here because it may take strength in numbers to address this issue and I am willing to go forward with it.

Now that it is getting cooler here I have the "Squeek". My salesman called me the other day asking how I like my truck (about the 3rd time in the past 6 months). I am not a person to bother with the small stuff but told him about the sqeek. He was concerned till I told him I was watching this website for a cure and for him not to worry, as I wasn't. If it gets too annoying I may try the Gaterbelt.

I had the problem. The dealer couldn't fix the problem and GM was no help. I had them check pulley alignment and they used some fancy laser thing and said all the pulleys were good. They tried new belts, cleaning the pulleys and these all fixed the problem for about 1500 to 2000 miles. I fixed the problem by moving the power steering pulley closer to the engine. I used a straight edge to eye ball alignment. It has been good ever since (9000 miles).

Jay

Mine squeeks. Went away for the summer and now it is back with cooler temps.

Mine has squeeked from day one,never really bothered me but having read these complaints, I might have my stealer look at it.

Mine squeeks terribly when its cold. Really very annoying to have my forty thousand dollar truck make these noises but I hate taking the truck to the dealer for service work. They haven't got anything right yet.

Guys this is nothing new some have had problems with these belts squeaking since the LB7s. At work if the belt is tight on our equipment and we have a squeak we just put some soap or silicone lube on it.

i'm now in the club i put on a belt at 1900 miles and now in the cooler temps its a constant sweap and gets annoying! i am going to mess with it at work one day and hopefully post up what i find. i have found no new tsb yet!

I will be receiving my 3rd belt tomorrow. was told the first new one was due to power steering fluid on belt from the leaky pump that was replaced. the second was due to some kind of oil getting on the belt when the power steering gear box had to be replaced. and i waited about 3 weeks for this belt to come in. the dealer told me there was a "national back-order" on the belts. the mechanic mentioned something about the altenator pully but the sound seemed to be coming from the drivers side. will keep yall posted

I just had my belt changed last week ( 1,300 miles ) So far so good. The service manager told me that he had never heard of the problem before.I told him to expect me back.

I have the squeaky belt. But I haven't taken it to the dealer since I don't want to put my truck back to stock.

Have any tried the old sand trick? Breaks whatever glaze may be on the belt

Same thing with my 06' LBZ, squeeks for 15min. everyday when cold. Had it to the dealer, they swapped out the belt and it worked great for about 10 days and the squeek is back ever since. I have been putting off bringing it back cause its a hassle to drop it off overnight so they can hear it cold, and they'll probably only put a new belt on for it to happen again.
Think I might get the gatorbelt and be done with it.
It sucks buying a $43,000 truck and the answer LBZ06 got is the best GM could do?

I've got squeaky belt syndrome. I plan on addressing it with the dealer this week.

Same thing with my 06' LBZ, squeeks for 15min. everyday when cold. Had it to the dealer, they swapped out the belt and it worked great for about 10 days and the squeek is back ever since. I have been putting off bringing it back cause its a hassle to drop it off overnight so they can hear it cold, and they'll probably only put a new belt on for it to happen again.
Think I might get the gatorbelt and be done with it.
It sucks buying a $43,000 truck and the answer LBZ06 is the best GM could do?

:exactly:

I started this thread 8 hours ago and already we have 12 people posting up that they have the same problem that GM says isn't really a problem.

Keep posting up because it's "the squeaky wheel that gets the grease" ....... or should I say "the squeaky belt" in this case.

Its not just the diesels either. I have the 8.1 and this thing squeaked since the day I bought it. Dealer replaced a number of things, same thing more than once, including the belt, many times. No mater what they did, it would come back any where from 200-2000 miles. Only thing that fixed mine I did my self, Goodyear GatorBack belt. Its been on for 18,000 miles with no squeak yet.

Mine squeaked since I picked it up almost a year ago, Worse when its cold. Plan on a dealer trip next week just before the 12 months is up, only got 11k on the truck now. I agree, nothing like 50k squeaker to tick one off.

I don't have the squeak on my truck, but do on my '05 Suburban 8.1. It's been to the dealer three times. They've changed the belt and idler pulley. It stopped squeaking for several months, but now it's back again.

Come on GM........fix em.

Can't believe this hasn't died w/all the posts about it.

If alignment isn't the issue....then it's the idler pulley and/or belt quality.

Mine= Problem w/in one month of new 11/02 in cold weather.

Dealer installed new belt...noise back w/in two weeks.
Another new belt....noise back w/in two months. Winter.
Noise non existant.....until damp/wet weather.

Dealer said can't fix real problem, so it was my turn. Still under warranty.

Noticed upper idler pulley moving in/out at various RPM's.
R & R pulley & new belt. Should have just done pulley for correct test.
Noise gone for 25K miles!!!!!
Noise back.....idler again moving in/out.

Will carefully lube idler w/ Mil Tech & teflon to see if noise goes away.
If it does, it's simple issue w/idler bearing, and will just keeping lubing it when noise returns.

mine only happenes during shutdown (really loud) but as long as it happens when it does I do not care. my father inlaws 06GMC LBZ is silent

Have any tried the old sand trick? Breaks whatever glaze may be on the belt

With all the sand storms out here, I bet that's why mine don't squeal.:D

I had the issue, mine was fixed by moving the power steering pump pulley towards the engine about 1/16th of an inch by my dealership.

My is only squeaking at shut down. A new alternator is waiting at the dealer that is suppose to clear up this problem. They said that the bearings in the alternator were the problem. When you watch the crank at shut down you can see the crank go backwards for a second but the belt stays in place. Will see if this fixes the problem. BTW don't try belt dressing...it makes it worse.

Mine started at 2000 miles. Now has 6000 and it squeals at idle. All the time.

ok guys maybe i can help as far as the noise on shutdown gm will replace your alternator with a clutch style that should be on most 06 model already but i guess ther are some without

as far as the squeek fix i have had several come through here and so far the only two things i have found in common is 1- power steering pump slightly to far forward (away from the pump) and 2- i have found that all the squeekers have a fluid that i have id'd as power steering fluid that seems to be weeping from the pump to resivoir seal and or the steering box all of which has been spread around by the fan getting it on the pulleys and belt. if you guys look under the truck at the crossmember directly under the sttering box its probably got sign of the leak.
if so tell the dealer or do it yourself to add oil dye to the power steering
resivoir,drive it for a week or so and then check it with a black light youll be amazed what you see
the whole front of the engine will light up but it will also help you/them find and fix the leak. that with the pulley being set back a very little bit and so far ive had none repeat visit.


hope that helps ill send a link to this thread to the gm rep in my area

:grd:

I currently have 7500 miles on my truck and it is squeaking quite a bit when it's cold. It's annoying and I don't like it when cold. However, after driving 38 miles to work, the squeak is gone. For the $42,000 price tag I paid on the truck, I guarantee you my luxury Jap car wouldn't have these issues.

Another squeaker here, 07 started at 600 miles, mainly when cold, dealer knows about it , but I have not taken it in, now has 1200 miles. I am new to the site, and to Duramax, sold an 06 Dodge 2500, after driving D-MAX I am impressed with this trucks performance, and it is totally stock.
David

If it helps the cause; I have an 06 with 8K miles and a squeaky belt at first start up and getting worse by the week. I too have the leaky power steering pump but have not taken it in for either.

Mine squeaks at idle and chirps at shut down but not enough to complain about.

Just for FYI, GM TSB


Diesel Engine - Cold Idle Drive Chirp/Squeal/Squeak

Bulletin No.: 05-06-01-018

Date: June 13, 2005

TECHNICAL

Subject:
Accessory Drive Belt Chirp, Squeal, or Squeak Type Noise at Cold Idle (Replace A/C Compressor/Power Steering Pump
Mounting Bracket or Enlarge Bracket Bolt Holes)

Models:
2004-2005 Chevrolet Silverado
2004-2005 GMC Sierra
with 6.6L Duramax(R) Diesel Engine (VIN 2 - RPO LLY)

Condition

Important :It should be noted that a chirp type noise on engine shutdown is normal for a diesel engine due to higher engine compression and the rapid stopping of the crankshaft. No repairs should be attempted for this condition.

Some customers may comment on an accessory drive belt chirp, squeal, or squeak type noise at idle, especially on a cold start. The noise may be reduced or go away after the engine warms up.

Cause

Some 2004/2005 Silverado or Sierra trucks, with a 6.6L LLY engine produced before June, 2004, may have an A/C compressor/power steering pump mounting bracket and power steering rear mounting bracket that are machined slightly out of specification, causing a misaligned power steering pump. If the power steering pump is misaligned, it will force the accessory drive belt to run farther inboard on the fan pulley. When the belt leaves the fan pulley, the belt will not align properly to the crankshaft pulley grooves and create a chirp or squeak type noise at the point of interference. Vehicles built after June 2004 will already have the new A/C compressor/power steering pump mounting bracket installed, but still may exhibit belt noise caused by the power steering pump rear mounting bracket.

Correction

Vehicles built prior to June 2004, replace the A/C compressor/power steering pump mounting bracket.

Vehicles built after June 2004, enlarge the rear power steering pump bracket bolt holes.

1. Follow the published service information (SI) diagnostics for drive belt chirping. The diagnostic chart for the drive belt chirping will ask to inspect for a misaligned accessory drive pulley.

Important :Remove the top section of the radiator shroud and TCM/cover to gain access to check alignment and measure the power steering pulley on the power steering pump shaft.

2. Verify that the power steering pulley is properly pressed onto the power steering pump shaft. Refer to SI for the power steering pulley replacement. If the pulley needs to be realigned on the power steering pump shaft, follow the published SI procedures for the power steering pulley replacement.

3. If the noise was not fully eliminated by the procedure in step 2, the power steering pulley may be adjusted with an allowable maximum variance of 1.0 mm (0.039 in) to the front from the flush position on the shaft to assist in eliminating any remaining belt noise. Refer to graphic illustration number 1 and number 2. Ensure that the power steering pump pulley illustration number 1 is flush against the power steering pump shaft illustration number 2, with an allowable variance of 1.0 mm (0.039 in).

4. If the noise was not fully eliminated by the procedure in step 3, and there are no other concerns found, follow the published SI diagnostics for drive belt chirping. Then, if the vehicle was built prior to June 2004 go to step 5. If the vehicle was built after June 2004, go to step 6.

5. Vehicles Built Prior to June 2004:

5.1. Replace the A/C compressor/power steering pump mounting bracket with P/N 97362175. Refer to graphic illustration number 1. Follow the published SI procedures for the Air Conditioning (A/C) Compressor and Power Steering Pump Mounting Bracket Replacement.

5.2. With the new A/C compressor/power steering pump mounting bracket installed, re-position the power steering pump to gain access to drill larger holes into the rear mounting bracket using a 14 mm (1/2") drill bit. Drilling the bolt holes larger will ensure proper alignment of the bracket when installing the bolts. Refer to graphic illustration number 2.

5.3. Install the power steering pump to A/C compressor/power steering pump bracket. Refer to graphic illustration numbers 4, 2, and 1.

Important :Power steering pump front mounting bolts must always be tightened first to ensure correct pulley alignment.

5.4. Refer to graphic illustration number 4 and tighten the front power steering pump mounting bolts.

Tighten

Tighten the bolts to 50 N.m (37 lb ft).

5.5. Refer to graphic illustration number 2 and tighten the rear power steering bracket bolts.

Tighten

Tighten the bolts to 50 N.m (37 lb ft).

6. Vehicles Built After June 2004:

6.1. Remove the front and rear power steering bracket bolts from the A/C compressor/power steering pump bracket. Refer to graphic illustration numbers 4, 2, and 1.

6.2. Re-position the power steering pump to gain access to drill larger holes into the rear mounting bracket using a 14 mm (1/2") drill bit. Drilling the bolt holes larger will ensure proper alignment of the bracket when installing the bolts. Refer to graphic illustration number 2.

6.3. Install the power steering pump to A/C compressor/power steering pump bracket. Refer to graphic illustration numbers 4, 2, and 1.


Important :Power steering pump front mounting bolts must always be tightened first to ensure correct pulley alignment.

6.4. Refer to graphic illustration number 4 and tighten the front power steering pump mounting bolts.

Tighten

Tighten the bolts to 50 N.m (37 lb ft).

6.5. Refer to graphic illustration number 2 and tighten the rear bracket bolts.

Tighten

Tighten the bolts to 50 N.m (37 lb ft).

used some of the advice i found on here about the pulley allignment and today the dealer fixed my problem (i hope) they said the power steering pulley was out of allignment by about a 1/32 so they moved it and the squeek chirp stopped for now

Had mine in for the squeaky belt they changed the alternator and not the belt before I got home it was squeaking again will bring it back again.

i had the chirp too and it has been good since my last trip to the dealer. However its not forgotten as I have heard return on cold start ups for just a few minutes and at a much lower sound level then it goes away. Ac unit has been replaced,Idler pulley, p/s pulley realigned a couple times 4th belt in less than 1800 miles. 2600 on it now. never had the chirp at shut down like some.
If it comes back I`ll have to get em to try the dye in the p/s pump l8r bb

I have experienced this sqeaky noise on startup and seems to go away as soon as engine is up to operating temp. Would be nice to have it go away!

Purchased my LBZ in June and only a month later the belt began squeaking at idle. Today at 4,500 miles it still squeaks and front of engine seems dry. It most likely squeaks all the time but is muffled out by the great turbo wine. If the pulleys are misaligned would this not wear out the belt?

2006 2500HD, CC SB

Took mine in to the dealer today so they could put on my Allison filter that they didn't change at my first service and so they could fix my squeaky seats (which there is a service bulletin on) and my loose headliner (6000 miles on truck). I told them about the squeaky belt and they said they were going to follow the service bulletin for 04/05 models posted in this thread. Called me at 4 pm to say they had to keep it overnight after I dropped it off at 8am and told them I had to have it back today.:mad:

Hopefully moving the pulley will fix the squeal, if not I'll get a Gatorback.

Well I have that problem and its a bit annoying especially since I only have 1200 miles on my '07. I need to make a call to the dealer, just been so busy lately.

Had the sqeeky startup at about 300 miles. Dealer looked at it and said it
had sand in the belt and wanted to know if I had been in the mud. I told
him that it had not eve been in the rain yet. They claimed to have cleaned the belt and then slobbered belt dressing all over everywhere.
Was quiet for about 200 miles. Bought a gatorback and made them put it on. Just got back from 2000 mile trip and some of the mornings were in
the 20's and still no noise. So far I am happy. If it gets through some of
the winter with no noise I will make them pay for the belt.

M and C
06 Z

I had the problem. The dealer couldn't fix the problem and GM was no help. I had them check pulley alignment and they used some fancy laser thing and said all the pulleys were good. They tried new belts, cleaning the pulleys and these all fixed the problem for about 1500 to 2000 miles. I fixed the problem by moving the power steering pulley closer to the engine. I used a straight edge to eye ball alignment. It has been good ever since (9000 miles).

Jay

Jay, is there a spacer behind the pulley you removed or how did you get it closer to the engine?

I'm in for this belt thing. I had mine replaced twice, the squeak is back, dealer says it's the belt, I don't believe it. I know they will work with me but they'll only go so far, i.e., replace the belt. I believe it's a mechanical thing and probably a pulley alignment issue. It could also be a metallurgy problem. Do you think the pulley warms up, expands and thereby realigns itself? Mine does it when it's cold out, but goes away after the engine warms up, much like the rest of you out there that have reported the same thing.

Home fixes are OK with me. Jay, share your solution. What did you do to get the pulley closer to the block?

The pulley is pressed on. You need a special tool to remove/install the pulley. I got one from Harbor Freight tool for about $20.

If it gets through some of
the winter with no noise I will make them pay for the belt.

Yeah--good luck with that thought.

If it gets through some of
the winter with no noise I will make them pay for the belt.

M and C
06 Z:funnypost

Dealer did the service work per the bulletin posted in this thread (for 04/05). Picked the truck up this morning and so far no squeak!!:ro)

So does anybody know for sure if there's a bulliten for the '06 LBZ? My dealer said he never heard it.

No TSB on 06 or 07

Posted in the other thread a few times. been to the dealer 4 times about this. new belt ,then dressing,new belt and this time new belt and alligned pulleys. this time is the only time the fix has lasted more than 2 days. benn about 4oo miles now and good but i believe it will be back.
hope strength in numbers works. if you come up w/some kind of petition i will sign

hope strength in numbers works. if you come up w/some kind of petition i will sign

That's why I started this thread.
Just think , not every Duramax owner knows about this website BUT out of the people who are on this site , look how many have posted that they have this problem and I only started the thread 4 days ago! 5 pages of replies in only 4 days.
Think of how many people have this problem but we just don't know about it because they aren't members of this site.:eek:

It is completely unacceptable for GM to say that this isn't a problem when soo many of us are having the EXACT same re occuring issue.:badidea: GM!

Just FYI, I still have the squeal after the dealer performed pulley alignment.:mad: Time for a Gatorback........

mine at cold start they tried to fix once. my 04.5 had same problem but was fixed

HAIL YEA MINE SQUILLS TOO PISSED AS HELL. GO'EN BACK TO STEALER MONDAY:mad:

I have about 9K miles and the squeak just started last week.

Well , my truck is at the dealership again.
My dealer is working very well with me , currently installing a gatorback belt for me.
He not only offered to install the gatorback and give me a loaner vehicle , but is also re imbersing me for the Gatorback belt.:ro)

You always hear negative stuff about dealers, I thought it was only fair to write something positive when it happens.

I just hope this is the long term fix. I will keep everyone updated.

My 2006 LBZ has had the squeak since 800 miles. I am now at 5400 miles and it is still doing it in the morning. I also noticed a small area of pink fluid under the truck yesterday morning. I need to get it in to the dealer to have it looked at. How much is a Gatorback belt?

My 2006 LBZ has had the squeak since 800 miles. I am now at 5400 miles and it is still doing it in the morning. I also noticed a small area of pink fluid under the truck yesterday morning. I need to get it in to the dealer to have it looked at. How much is a Gatorback belt?

The gatorback belt was $43 delivered.

Hello to all,
I too have a big problem with my belt squeaking very badly. Bought my Chevy 2500 Quad Duramax/Allison July 4th weekend, has 2575 miles on it as of today and the belt has been squeaking for the past 6-8 weeks. I have tried belt dressing and it works for about a day. Squeak is so bad that it drives me crazy while driving down the road even after the truck has warmed. I have to turn the radio up very loudly to drown out the noise. I recently put a few drops of oil on the belt and that has provided some help, but you can still hear a quieter squeak.

I called my dealership (Classic in Grapevine) and they said they have never heard of this problem before. Looks as if many others too are having this same problem. Other than this issue, truck is awesome. I am happy I bought it but for a truck that costs over 40K, I would not have expected a problem like this. Looks as if I am not alone here. If someone has successfully had this repaired, please let me know what they did to fix it. I do not want to get into the cycle of taking it back once a month while they try and figure out the problem.

Thank you and happy holidays.
Philip Dickson

My truck is quiet again after installing the Gatorback belt.
I will keep posting updates.

I now have 2500 miles on my gatorback and still no chirp. The factory belts only lasted 400 miles ( all 4 of them). Seems to be the easiest fix especially if you get your dealer to pay for it.

No TSB on 06 or 07

There is a TSB for the chirp, the following number:

#1847901.

$36.99 from Advance on line.Belt dressing is bad news,all it does is weaken the belt and makes a mess.

Cold Start Belt Chirp - keywords AC A/C accessory air bracket compressor conditioning diesel drive engine idle LBZ LLY mounting noise power pump rattle squeal squeak steering #PIP3965 - (11/01/2006)



Models: 2006-2007 Chevrolet Express, Silverado

2006-2007 GMC Savana, Sierra

Equipped with the 6.6L diesel engine RPO codes LBZ and LLY




--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
The customer concern may be a accessory drive belt chirp, squeal, or squeak noise at idle. The noise may be reduced or gone after the engine warms up.

Note: Please do not replace the accessory drive belt for this concern. If the belt is replaced, the noise may temporarily diminish, but retune after the belt breaks in.

Recommendation/Instructions:
2004-2007 C/K trucks & 2006-2007 G Vans, with a 6.6L LLY engine produced before June, 2004 may have an A/C compressor/power steering pump mounting bracket and power steering rear mounting bracket that are machined slightly out of specification.

Vehicles built with a 6.6L LLY or LBZ engine after June 2004 will already have the new A/C compressor/power steering pump mounting bracket installed, but still may exhibit belt noise caused by the power steering pump rear mounting bracket and/or Power Steering Pulley alignment.

Please refer to bulletin number 05-06-01-018 for 2004 to 2005 vehicles and belt chirp.

For the 2006 and 2007 LBZ and LLY engines complete the procedure below.

Remove the rear power steering bracket bolts that bolt to the A/C compressor/power steering pump bracket.



Loosen the front power steering pump bracket bolts that bolt to the A/C compressor/power steering pump bracket.



When reinstalling the bracket, torque the front mounting bolts to 50Nm (37 lb ft). Do not reinstall the rear power steering mounting bolts that bolt to the aluminum bracket. (The front power steering pump bracket bolts must always be tightened first to ensure correct pulley/bracket alignment)
Use a mirror and flashlight to observe the alignment between the rear power steering bracket bolt holes and bolt holes in the aluminum bracket. If the holes are aligned properly install the bolts and torque to 50Nm (37 lb ft).
If the holes do not align properly replace the rear power steering bracket with part number 97209551.
Install the rear bracket and torque bolts to 50Nm (37 lb ft).
Note: If the noise was not fully eliminated the Power Steering Pulley may be adjusted a maximum of 1 mm (.039") to the front from the flush position on the shaft to assist in eliminating any remaining belt noise.

Note: Please do not replace the accessory drive belt for this concern. If the belt is replaced, the noise may temporarily diminish, but return after the belt wears in


FOUND THIS TONIGHT WHILE SEARCHING AROUND. IF I HAVE TIME I WILL TRY THIS ON MY TRUCK AND LET YOU GUYS KNOW WHAT HAPPENS! TIRED OF THE SQUEAK!!! WE ALSO CALLED TECH ASSISTANCE YESTERDAY WITH NO HELP AND NO MENTIONING OF THIS BULLETIN!

My belt was very noisy in the mornings. The dealer has had my LBZ for 2 days. The bulletin directed to loosen the power steering pump then torque the front bolts..... Didn't work - had to wait till they tried that before ordering a new bracket. It is being installed now, have to wait and see. Worst of all, they gave me a montanna to drive, not really a bad loaner. I just need to get some Groucho Marx glasses with the big nose and mustache because I have friends that have a camera in the car with them just to get a picture of me driving this thing.

Just noticed last night goint through a drive through that I have the sqeeky belt problem.

update: i put some brake pad grease like you get in a brake pad kit on the belt and the chirp is now gone. i will let you know for how long it stays like this!!!

Mine is noisy all of the time, regardless of the temp. It happens at idle to above idle untill the engine noise overtakes. I've had the belt replaced by my freind at the dealer once. Problem came back in under 1000 miles.

Mine started squeaking withing the first 500 miles. I took it in and the dealer moved my power steering pully back about 1/16" and it has never squeaked again. That was about 4 months ago.

mine squeeked on the 2001, not sure yet on the 07 - only a few days old

mine has been squeaking lately but i cant remeber when it started exactly. i never even thought to take it to the stealer because of the whole issue of it being a wear and tear item, or at least thats what i was told when my old lb7 had that problem.

3600 miles on mine now and its still fixed:) Hoping this is a dead issue for me as it squeaked half the time i`ve owned it. if I here it I`ll let everyone know:D
Sure do like the truck):h l8r bb

just droped off my truck at the stealers today. I had to tell them about the fix and have them look it up. The last belt lasted 500 miles. They are going to keep it overnight and check it out i the morning. They said they had to verify the noise. I guess they cant just listen to the owner. I'll post after i pick it up tomorow. Good luck to all of us....

i have the squeaky belt at start up but it is going in monday to see if they can fix it

My 06 lbz has been in three times for squeeeeeeeeeeeeeeeky belt. Now its back again. My dealer has tried everything. I think Isuzu has some mad squirrels hideing under my hood.

My dealer put some belt dressing on my belt 3 days and 275 miles ago and the squeak is gone. If it comes back they are going to try replacing the belt. I asked about the Gatorback belt and the tech said it does not have ribs all the way across and he didn't think that would help anything.

My truck has been in twice for the squeeking belt it is right on the power steering pulley. They replaced my belt and adjusted the pulley worked good for about 2 months and it is back again. any suggestions

Had my belt replaced at 1600 miles. Everything was good until a few weeks ago when the weather started to get cooler. Wife says one day "That Censored Censored Belt is starting to squeak again.GET IT FIXED".Truck has 8k on it now. Going to dealer Monday. I will give them a copy of the TSB I found on here. We"ll see what happens.
Will update

I got the truck back last night and so far so good. According to the dealer they adjusted the bracket and the pully as per the TSB.

We'll see.

My truck chirpped at shut down,Just noticed yesterday that it dont chirp anymore.Truck has 21k on it now.

Squeaky belt started at about 3 thousand miles. Am currently in Nashville with 21,000 miles on truck and going to dealer Monday to have checked. Also ordered Gatorback Belt from Advance Auto Parts to keep as a spare.

Dudes, STOP taking it back to the dealer and just fix it your self by installing a GOODYEAR GATORBACK belt.... The time and money it takes to do it yourself, will save you from wasting more time at the stealership. I had mine replaced twice while under warranty.. The belts only lasted 5k at max.... Installed a GATORBACK, and have not had the noise return yet.

I Have 6500 Miles On My 06 Cc/sb Sumitt White Lbz With Silverline Exhaust. And Have Had The Belt Replaced Once And It Needs It Again.

New to site. Have been reading posts since Nov. 1st.
Had the "squeeky belt" problem come up at 450 miles. Took it in and they replaced idler pully. Didn't stop belt noise so they put a new belt on. Put another 400 miles on and the noise returned. Thanks to this site I was able to give the dealership tech the TSB# for the repair. He said the bulletine just came out on 11/2/06. He contacted some "big dog" person in the GMC office about the problem and was informed that the power steering pully needs adjusted out 1mm. I was informed that this fix has been successful. After tomorrow I will know if it does the trick.

I have a new 2007 GMC 2500 with LBZ and has squeaked in the same manner. 2000 miles now and still the same annoying sound.

OK all 2006-2007 Duramax owners with the squeaking belt problem. Took mine in today for the fix described in the TSB. The diesel tech adjusted the power steering pully (as per TSB) out 1mm and the noise was even louder. He then moved the pully back to flush and it still made noise. My tech got frustrated and then noticed that the pully needs to be adjusted inward instead of outward per TSB. He adjusted it inward 1mm and now there is no noise. No belts or brackets need to be replaced.

My 2003 Dmax has had a belt squeel every year with the cold wet weather...the dealer has replaced the belt 3 times, and moved A/C twice.

Just last month the belt squeel started again, now not under warranty.

A WD-40 spray works for about 15 minitues, was about to replace belt again but will do so with Gaterback one.

Thanks for this thread....

Did not read whole post but... first time they replaced the Turbo assembly squeak stop. next time adjust power steering pully squeak stop. last time adjust power stering pully again squeak stop. and no squeak since then so hopefully its over

Don't you guys know not to put ANYTHING on a belt?All you're doing is a temporary fix--you're weakening the structure of it.Not to mention if you put enough on,it might lose it's friction and slip.No WD-40,KY Jelly,Duck Butter,or even the official ''belt dressing''.

this is my first post,

My truck has the squeak 500mi to present 3k.

07 long bed Duramax SLC, UT

I've been told mine squeaks, and is very loud. I've also been told I need to spend $4000 on hearing aids. Neither one bothers me.

My dealer put belt dressing on against my wishes, and it cured the problem until I went through a touchless car wash. The squeak came back, and was LOUDER than ever. I could even hear it inside the cab while driving. I took it to a dealer closer to home and they found that there was a battery lead rubbing on the power steering pulley(from a car wash?). The loud squeak is gone, but there is still a slight squeak if you listen for it. Time for a Gatorback I guess. Who has had a Gatorback the longest without squaking(miles or time)?

My classic has dual alternators. Truck has 650 miles. Dealer says chirp on shutdown normal and alignment is fine. Truck squeaks but not bad while running.

What do I do?

1. Put a Goodyear belt on it, if so, do they make one for the dual alternators?

2. Do I shim the power steering pulley in myself 1/16th, even though they said it was fine? DUAL alternators make a difference?

I took my truck in for the 5th time last week. This time they replaced the fan mount hub and replaced the belt. They have now replaced everything that the belt comes in contact with. Its quiet now but we'll see how long it will last. when i got home and looked under the hood i noticed that they cut the insulation on the AC hose that goes across the alternator. The alternator seems to be hotter than it should ane the guage is not steady.
So far they have had my truck for 15 days and drove it 200 miles trying to fix this problem. I think they should extend my warrenty buy me a tank of fuel and make half a payment. What do you guys think??

I have never had a squeak but with 51thou the belt has a few rough edges starting to show , I have a gatorback but have looked at it and it looks hard as heck to get to , has anyone done a LBZ and if you can get to the tensioner will the belt go in around all the fan/shroud etc junk on the front of the motor any suggestions to help? Thanks

Takes about 20 min, not too bad, just tight... Did 3 of mine during pm's yesterday. Found it did help on the reinstall to start the belt and then adjust on the crank pully from below, put over all the pully's including the idler excluding the alt, moved idler untill it went over alt, dbl check and good to go.

what is the life expectancy of these belts? I bought my 04' with 84K miles and just passed 100K last week. No problems thus far. Do u guys change them only if they crack/break or squeak or do u replace them at another interval(months or milage).
Thanks,
Mike

Shoot for 50k, unless they are cracked or squeaking...

My 6.0L gasser has been chirping since 50K (now at 90K). It has always been very low volume, but with the cold weather it did get louder, and stay longer. In the past 3 days it has gotten HORRID...embarassing as hell to drive it down the road. I went today and picked up a Gatorback...no point in going to the dealer...they have been unable to fix any of the other NUMEROUS problems with this POS Silverado.

Did I mention....I hate this truck!!

Good luck with GM. I never got anywhere regarding the spedometer...or the seat popping,...or the a/c vent actuator,...or the radio,....or the 4WD switch....or the....you get the point:(


BUY A FORD!!!

I've been dealing with the squeaky belt for 2 years now. Dealer has replaced pulleys,belts,etc... They even applied belt dressing, which the first of three service managers told me not to do. I installed Goodyear Gatorback last week. 03' LB7 seems to run better with no squeak.

Belt Squeaks are a diesel thing best i could come up with was diesels are high compression engines which turns harder plus add a super tight belt to it and you got a squeek i had cummins, cats, and detroits do it too a belt is a belt no matter if its a gator back or not they only last so long

I went to the dealer the day after christmas to see what they could do about the belt squeak that had become very annoying, mentioned the TSB about the Power Steering pump bracket and they fixed the problem by replacing the bracket, left the old belt on the truck and I have had no issues with a belt squeak.

mine chirps or squeaks also
2006 lbz with 20k

mine squeeked the first 2,000mi on cold start but went away and has'nt come
back

My 6.0L gasser has been chirping since 50K (now at 90K). It has always been very low volume, but with the cold weather it did get louder, and stay longer. In the past 3 days it has gotten HORRID...embarassing as hell to drive it down the road. I went today and picked up a Gatorback...no point in going to the dealer...they have been unable to fix any of the other NUMEROUS problems with this POS Silverado.

Did I mention....I hate this truck!!

Good luck with GM. I never got anywhere regarding the spedometer...or the seat popping,...or the a/c vent actuator,...or the radio,....or the 4WD switch....or the....you get the point:(


BUY A FORD!!!

Maybe the problems you have with the dealership are related to your ranting. The people that work at dealerships are pretty much like the rest of us. They just want to be treated with some measure of respect and dignity. I am not saying you have done anything less than that, but your post (above) is somewhat bewildering. If you really hate your truck, sell it and buy something else. Here is a link to a Ford Diesel site where you can associate with other GM haters. http://forums.thedieselstop.com/ubbthreads/postlist.php?Cat=0&Board=2003Drivetrain1

However, if you wish to associate with people that genuinely enjoy corresponding and solving problems with there GM trucks and vans, stick around and read the many replies from a variety of people with a wide variety of backgrounds and experience.

What you can learn and accomplish is incalculable.

Good day.

I have an 06 LBX Sierra, belt sqeeked at 1800mi., dealer replaced belt and sqeeked again at another 1800 mi. , i purchased a Gatorbelt, truck is now at 10,000 mi and no squeeks. :)

See how far ya get with ford when the truck has issues. Been there done that, only difference is I only kept it for 3 months, be damned if I was gonna make payments on something I couldn't use.

I started this thread and haven't logged on here in months. .........

The Gatorback belt I put on thousands of miles ago WORKS! I have not had ANY squeaking or chirping since the Gatorback was put on and my truck now has 11,000+ miles on it.

The Gatorback works , long term. :D

I didn't read ever single post in this thread but I'm posting this I found, use the search and type in chirp lost of threads for this one. Anyway i found this in there awhile back.



http://img.photobucket.com/albums/v127/graviz/Autos/1-ColdChirp.jpg?t=1169524454 (http://img.photobucket.com/albums/v127/graviz/Autos/1-ColdChirp.jpg?t=1169524454)
(Image has been resized. Click it for full size.)







http://img.photobucket.com/albums/v127/graviz/Autos/2-ColdChirp.jpg?t=1169524615 (http://img.photobucket.com/albums/v127/graviz/Autos/2-ColdChirp.jpg?t=1169524615)
(Image has been resized. Click it for full size.)




http://img.photobucket.com/albums/v127/graviz/Autos/3-ColdChirp.jpg?t=1169524802 (http://img.photobucket.com/albums/v127/graviz/Autos/3-ColdChirp.jpg?t=1169524802)
(Image has been resized. Click it for full size.)

I started this thread and haven't logged on here in months. .........

The Gatorback belt I put on thousands of miles ago WORKS! I have not had ANY squeaking or chirping since the Gatorback was put on and my truck now has 11,000+ miles on it.

The Gatorback works , long term. :D

If only they made it for a dual alternator setup!:mad:

Add me to the list. I have had 5 or 6 belts on my 03. THe dealer has replaced all pulleys at least once and has adjusted the power steering pulley per the bulletin. Im going in next week for another belt. I t seems to work for about 2 months then the squeak returns. Manager he would keep replacing the belt for as long as own the truck..............

My LBZ squeaks with 1300 miles on it. Haven't been to the dealer yet.

mine squeeks even after new belt

my 03 has had so many belts and pulleys replace ive lost count. dealer says they will replace belt ever time it squeaks. seems to be every 4,000 miles.

Mine is still quite 11,000 so far

I have 12,000 miles on mine and it sqeeks - has since 2,000 miles. The interesting part is, it is not all of the time. Seems to happen when the truck is cold but it is warm outide. If it gets too cold out, it stops. Have been to the dealer three times but it always seems to stop when I get there. Since they have not heard it, they will do nothing. Looks like a gatorback for me. Ticks me off though. As much as these trucks cost, the stealer should fix it.

Mine squeaked,dealer said he had a service bulleton on it.Took it down after part came in and he fixed it.No more squeak.He installed an adapter on the water pump bracket I think.Said the holes were drilled off in the block from the factory.It was no big deal to get it fixed.2007 DRW GMC LBZ,built NOV. 2006.No more annoying squeak.

My '07 has the belt squeak, my father-in-laws '07 does not. I dropped mine of again this morining at the dealer (2nd time for this problem). The first time they moved the p/s pump pulley in 1 mm (according to the service writer). The squeak is still there. The service guy told me that they have a different belt (slightly shorter) that has solved the problem in some other trucks (so he obviously has seen this before). He also stated that if the belt did'nt fix it he would order a new p/s pump as that has also fixed the problem in the past. It definately only squeaks when the truck is cold and it is cold or cooler outside. When I started the truck this moring it did not squeak, but we're seeing some warmer temps around here. I agree with some of the earlier posts, I try not to sweat the small stuff either, but for what we pay for these trucks sometimes the "small stuff" is the most annoying. Sorry for the long post, I appreciate you guys starting these threads and getting some of this info out there.

Greg

My 06 LLY Squeaks, and the dealer said it "normal" theres nothing you can do about it, its a high compression engine...

Looks like i should print out the bulliton and bring it in...

Picked the truck up at lunch time. Service Dept. called and said they will have to order a new p/s pump. Told me to come get the truck and they will call when the new pump comes in. I also mentioned the TSB, but I think I will also print it out and bring it in.

you guys ever hear of soap...

Mine started to squeek, right at 2,000 miles..........

I'm the one who posted the thread that was ref'd in the first post. Just as an update, I've got 19K on the clock now, and no squeeks.

My squeaking belt and I had a conversation this morning, its all I can due to keep sanity, when GM says this is a normal occurance. The least they can do is lie and say it will go away after break in.:mad:

i just had mine in and they replace the power sterring pump bracket and belt and it fine now.only 365 miles on the truck, brand new.

ok guys the noise is back nd louder!!! so i put dish soap on it and got quit for a while...but i will take it back and tell them about the gatorback. i'll let you know.

isn't there a clutched alt to fix this problem

isn't there a clutched alt to fix this problem
i don't think so, mine has one, i check and made sure it was working,anyways i just finnish replacing the belt to a gatorback and will post tomorow on how well it works.

4 months now with the Gatorback belt and truck continues to be quiet as a mouse....except for the diesel clatter and tire squeeling on hard takeoffs

I got the squeaky belt problem. Still looking for a fix.
'03 LB7

My problem is intermitent and seems to be related to temperature. Really hot out or really cold out and it stops. Medium temperature and sqeels like a stuck pig. Stops by the time I take get it to the dealer. They do nothing because they say can't hear it.

ok guys the gatorbck works great....this morning tems are 38 deg and no sqeeks....38.00 never sounded soo good. bought it at schucks.

My problem is intermitent and seems to be related to temperature. Really hot out or really cold out and it stops. Medium temperature and sqeels like a stuck pig. Stops by the time I take get it to the dealer. They do nothing because they say can't hear it.
stop going to them and do it yourself.mine is still under warranty 477 miles they kept my truck for three days and no fix,until saturday i went to schucks and bought a 38.00 gatorback pk3035 and it works, it took me 15 minutes to strap the new one on.

Add us to the squeeky belt list. The classic truck in my sig has had it since day one. On a side note I can't wait to get that truck. When the LMM comes in later this week we have to transfer the toolboxes and fuel tank from the LBZ, then the LBZ is mine.

Mine was squeaking with only a thousand miles on it or so, dealer replaced it at no charge

Mine was squeaking with only a thousand miles on it or so, dealer replaced it at no charge
yea i got mine replace once at dealer and it started to squeak at 30 miles later so i replace it myself. 38.00 my cost=38.00,my truck was at the dealer three days my cost 450.00 of lost time. so 38.00 is pocket change.

I just bought a 2007 Crew Cab Dirty AX. I went back to the dealer with the squeak. The Service manager said it was a well known problem the 06 and 07 have. The pulleys coming out of the manufacture where not aligned properly. The dealer said that GM has a new bracket and pulleys to fix the problem that is covered under warranty. The sound of a bird chirping is gone and a new sound has appeared that the dealer said they don't know how to fix it. It is very high pitched squeal but, low enough you can't hear it over the turbo.

First post for me. 1500 on the truck so far and taking it in tomorrow for a squeeky belt for the third time. The 1st time they did nothing, the second time they removed the belt and cleaned the pulleys. Problem solved for about 1000 miles. They told me they would replace the belt if the squeak came back so here we go again. I love the truck but the squeak is pissing me off. Should I take a gatorbelt with me and have them put it on? I'm a diesel newbee and new to this site so be gentle.

First post for me. 1500 on the truck so far and taking it in tomorrow for a squeeky belt for the third time. The 1st time they did nothing, the second time they removed the belt and cleaned the pulleys. Problem solved for about 1000 miles. They told me they would replace the belt if the squeak came back so here we go again. I love the truck but the squeak is pissing me off. Should I take a gatorbelt with me and have them put it on? I'm a diesel newbee and new to this site so be gentle.
yes!!!!!their belts are garbage.

changing the belt is easy to replace,all you'll need is a needle nose plyers,9/16 socket and a 1/2 drive ratchet,remove the two 9/16 botls on top off the fan shroud and the four clips with the needle nose plyers that are at the bottom of the shroud,they are located half way. it took me about 10 minutes to change.i hate the location of the tensioner ,so be careful not to damage the radiator fins.

I almost forgot. the 2007 does not have the belt diagram sticker on the fan cover anymore so you'll need the owner's manual(duramax).another thing that gm is doing to prevent a owner from doing ther own maintanance. what's next gm next year no more owner's manual!!!????

These may or may not be dumb questions, but when a service bulletin has been released for a problem, can any dealer fix it or does it have to be fixed where it was purchased? Are service bulletin items something I (or owners in general) have to pay for, or are they covered under the warranty?

Reason I ask is the dealership where my truck was bought is across the state, and I noticed today while driving that wih the radio off I can hear that damned belt very well. At times with the radio on it's noticeable too. Anyway there are two GM dealers here in town, was wondering if they'd tweak what needed to be tweaked without charging me.

These may or may not be dumb questions, but when a service bulletin has been released for a problem, can any dealer fix it or does it have to be fixed where it was purchased? Are service bulletin items something I (or owners in general) have to pay for, or are they covered under the warranty?

Reason I ask is the dealership where my truck was bought is across the state, and I noticed today while driving that wih the radio off I can hear that damned belt very well. At times with the radio on it's noticeable too. Anyway there are two GM dealers here in town, was wondering if they'd tweak what needed to be tweaked without charging me.

Take it to the local dealer. You may not get preferential treatment but they will do the repair.

My LMM has been in the dealer since Friday trying to fix the constant serpentine belt squeak. It started at about 300 miles and the dealer wants to try replacing the belt tensioner and the belt. He received the tensioner yesterday but cant locate the new LMM belt because he says the parts are too "new". This sounds like BS to me! I feel like taking the truck back and trying the Gatorback belt myself. Does anyone know if the belt on the new LMM with dual alternator is the same as the 06 models?

Update: The dealer did replace the belt and the tensioner and so far the problem is resolved. I also brought the truck in for a "service 4 wheel drive" code on the DIC. They told me that they had to do a reporgram of the transfer case relationship. I am not sure if they ever did this bacause as soon as I started the truck at the dealership, the message came back on and the 4 wheel drive will not engage. It was after hours when I picked up the truck so it looks like I will have to have another discussion with them today. This is why I dislike dealership service departments.

Well I had the local dealer look at it this morning, the service manager assured me the belt was glazed and just needed to be replaced. But guess what, no belt in stock. "Well you know, since it's so new we had to order it. We'll give you a call when it comes in." Ok... I'll let them replace the belt, I'll drive it. When it starts its constant squeaking, I'll be back, with a copy of the TSB for LBZs.

I had a buddy with a 06 lly dmax. his was sqeeking so he took it to the dealer and they replaced the belt. told him if it contuines doing it to bring it back. well it started sqeeking again so he took it back and they changed the water pump. and has not sqeeked since. i think they told him that there was something wrong with the gears inside the water pump.
steve

Well I had the local dealer look at it this morning, the service manager assured me the belt was glazed and just needed to be replaced. But guess what, no belt in stock. "Well you know, since it's so new we had to order it. We'll give you a call when it comes in." Ok... I'll let them replace the belt, I'll drive it. When it starts its constant squeaking, I'll be back, with a copy of the TSB for LBZs.
tell the service manager if it's so new why does shucks auto parts has them in stock? i bought mine there a week ago. part number is 6pk3035 gatorback.

I had a buddy with a 06 lly dmax. his was sqeeking so he took it to the dealer and they replaced the belt. told him if it contuines doing it to bring it back. well it started sqeeking again so he took it back and they changed the water pump. and has not sqeeked since. i think they told him that there was something wrong with the gears inside the water pump.
steve
ok i'm back and got my body suit on, what does the gears in the pump have to do with the belt squeeking?boy this in deep.

Now at 6 months with Gatorback belt upgrade and truck still quiet as a mouse....well almost it's still a diesel.

Gears inside of a water pump? Oil pump maybe but I don't think water pump.

talked to my buddy today and he comfirmed what i had said about the water pump. he said the service tech took the belt off and started the truck since the water pump is crank driven and it was still sqeeking they replaced the pump and no other problems.
this is what my buddy said the service guy told him but i dont know.

I'm with Quick6; driven over 8,000 km with new Gatorback and NO squeak.

talked to my buddy today and he comfirmed what i had said about the water pump. he said the service tech took the belt off and started the truck since the water pump is crank driven and it was still sqeeking they replaced the pump and no other problems.
this is what my buddy said the service guy told him but i dont know.
i know there's gears on the water pump,but the belt sqeek is a dry sqeek and not a gear one. what year truck? and how many miles? the gears on the pump are inside engine and lube by engine oil,it's hard to hear a sqeek from inside the engine.

it an 06 lly with a six speed manual tranny. they fixed with like 4000 miles on it since then no sqeek and it has 20000 on it now and no problems. other than he broke a fuel return line changing the fuel filter. how he done it i dont know.

Lennox69: Is that part number for the new 07.5 Silverado LMM with the dual alternators?

Update: Guess what, the truck started to squeak again today. Gatorback here I come.

Lennox69: Is that part number for the new 07.5 Silverado LMM with the dual alternators?

Update: Guess what, the truck started to squeak again today. Gatorback here I come.
the part #6pk3035 is for a 2007 lbz and one alt.Classic ,just take the old one in so they can match it.

Lennox69: Is that part number for the new 07.5 Silverado LMM with the dual alternators?

Update: Guess what, the truck started to squeak again today. Gatorback here I come.

Good year doesn't make a gatorback belt for the dual alternator...:( Went thru this 4 mos ago..

i learn this thing awhile back when i was at the farm.....never let the parts counter guy go by what a computer says, take the old one and have them measure it, belts are not built by car model they are by lenght. tell the parts guy to measure. the also told me that they did not make one for my lbz on the phone,so i took it in and got one,good year makes all sorts off lenghts ..any 6 rib good year right lenght will work. all you'll need is your old one..mine is 119" you'll probably need 120 or more.

Took mine in this morning - one last time. It was sqeeln like a stuck pig so at least they can't say they could not replicate the problem. We'll see what they come up with this time. I know I should have put a gator on it already but I just can't stand to fix soemthing they should be fixing.

I sent an e-mail to Goodyear to see if they could find the belt for the new LMM with the dual alternators, they sent me a reply:

Goodyear does not currently have any listings for your application. If you have the part number off the belt, I can try to cross the part number. Or if there is a "PK" number on the belt, I can look the belt up by that. An example of a PK number would be 8PK2335.
This example is an 8 rib belt that is 2335 mm long and translates to our part number 4080920.
Regards.

I sent an e-mail to Goodyear to see if they could find the belt for the new LMM with the dual alternators, they sent me a reply:

Goodyear does not currently have any listings for your application. If you have the part number off the belt, I can try to cross the part number. Or if there is a "PK" number on the belt, I can look the belt up by that. An example of a PK number would be 8PK2335.
This example is an 8 rib belt that is 2335 mm long and translates to our part number 4080920.
Regards.

of course they won't have any listings,the truck is too new. mine is a 2007 too, and they said the same thing.my belt was pk3034,and replaced with pk3035 gator.whats your belt #,so we can help you.

Took mine in this morning - one last time. It was sqeeln like a stuck pig so at least they can't say they could not replicate the problem. We'll see what they come up with this time. I know I should have put a gator on it already but I just can't stand to fix soemthing they should be fixing.
i agree with you all the way,but i just can't leave my truck in the shop(dealer):mad: for days on a stupid belt problem.:mad:

I sent an e-mail to Goodyear to see if they could find the belt for the new LMM with the dual alternators, they sent me a reply:

Goodyear does not currently have any listings for your application. If you have the part number off the belt, I can try to cross the part number. Or if there is a "PK" number on the belt, I can look the belt up by that. An example of a PK number would be 8PK2335.
This example is an 8 rib belt that is 2335 mm long and translates to our part number 4080920.
Regards.

ok i just got the gm part # is 98025664 for dual 125 amp alts,now i have to cross it,stay tune.

Update on my squeak: Last Friday my belt came in @ the dealer, that they had to order in the first place.:rolleyes: This morning I pull up right at 8:30 (didn't have appointment, just stoped in to check) they weren't busy, only 2 trucks in at least 8 bays that they have. At 9:20 I went back into the shop to get my morning beverage and cell phone, I asked the manager if it was going to live, he chuckled and said that the old belt wasn't even off yet.:banghead: ("You've had it almost an hour and my air cleaner housing and several other things are on the floor, but the belt is on it?"...this is what was going through my head) So at approximately 10:45 I get my keys back. It doesn't squeak with the new belt, but time will tell. I just thought over 2 hours to change the damned belt was a little excessive.:mad: I mean I read the accessory manual at the parts counter for at least 30 minutes, paced around the showroom, the lot, the shop...WOW!

on my second belt and it just started to squeek again. only 9,000 miles on it

Update on my squeak: Last Friday my belt came in @ the dealer, that they had to order in the first place.:rolleyes: This morning I pull up right at 8:30 (didn't have appointment, just stoped in to check) they weren't busy, only 2 trucks in at least 8 bays that they have. At 9:20 I went back into the shop to get my morning beverage and cell phone, I asked the manager if it was going to live, he chuckled and said that the old belt wasn't even off yet.:banghead: ("You've had it almost an hour and my air cleaner housing and several other things are on the floor, but the belt is on it?"...this is what was going through my head) So at approximately 10:45 I get my keys back. It doesn't squeak with the new belt, but time will tell. I just thought over 2 hours to change the damned belt was a little excessive.:mad: I mean I read the accessory manual at the parts counter for at least 30 minutes, paced around the showroom, the lot, the shop...WOW!

It took me all of 12 minutes to install my Gaterback belt....

6 months later and still happy with performance and quietness

Lennox69: I checked the belt that is on the truck now it is: PK3506. Can you cross reference it and get the Goodyear gatorback belt number?

Thanks

2 hours on the LBZ is about right, major PIA

Lennox69: I checked the belt that is on the truck now it is: PK3506. Can you cross reference it and get the Goodyear gatorback belt number?

Thanks

The stock belt for a dual alternator is 3476mm. According to Good Year they do not make a Gatorback 6 rib belt in that size. They make one that's close but not enough. LMM and LBZ are identical for the dual alternator setup and I said earlier as of a few months ago Good Year is not and will not be making them according to the rep I spoke with...
Trust me, I'm looking into if I can just simply take off my current belt and put on the single alternator belt from goodyear and save my long belt for when I need the 2nd alternator...
I hate the chirp!
BTW: the new dealership I went to told me they'd fix the chirp, one way or another. Spoke of putting two clutched alternators on my setup to stop it. I told them the a new belt would not help and the all the alignments have been checked so we'll see what happens...

Heron: Thanks for the info. My dealer installed a 3506 mm belt and yours appears to be 3476 mm in length. Is this close enough or did my dealer install the wrong belt? I wonder if there really are differences between the LBZ and LMM with the dual alternators.

I'd like to throw in with the Gatorback users. My jeep would squeal when the weather changed. Applying a candle to the belt, retensioning, repacking idler pulley bearings, replacing water pump.... none of that stuff worked for long. But a new Gatorback shut that thing up. If my LBZ ever starts squeaking, a Gatorback is gonna be one of the first things I do to fix it.

Heron: Thanks for the info. My dealer installed a 3506 mm belt and yours appears to be 3476 mm in length. Is this close enough or did my dealer install the wrong belt? I wonder if there really are differences between the LBZ and LMM with the dual alternators.
ok here we go!!!! your part gm is 9802564 and the 6pk3506 is ref at 4061203 gator,i drove to shucks auto in kennewick wa, and they had one ,the numer reading is 40 for the series, 6 for ribs,120 for the inches,3 is for .3,so this belt is 120.3 inches and 6 ribs, series 40. they also said if it does not work you can return no questions ask, so there's nothing to loose but a 1/2 hour of your time.this is for the lmm engine!! and not the lbz

ok went to the dealer(my friend owns it) and try to install the gator in a lmm and it did not work,sorry but we are back to square one.

Lennox69: Thanks for all of the help! I guess we are back to square 1.

Does anyone on this page have any clues where to go from here?

The squeal does seem to come and go depending on the weather. It is really starting to pi#@ me off at this point!:mad:

Took it back in (5th time). They ignored me about the PIP, tightened a few bolts, sounded good for about 3 hours, sqeekn like a stuck pig again.
I recommend anyone in colorado avoid BURT Cheverolet like the plague. I have had it with those bone heads.

My 07 Classic started at 2k miles. It isn't as loud as my 03 was so I am waiting to take it back.

There is a differant belt they will put on there that takes the noise away. My was in the shop 4 times for squeaky belt and finally they put this new kind of belt on and it's been good for months.

Hmmmmm my truck is in the shop right now, they did the TSB which had to do with replacing the power steering pump bracket and that did not cure the noise. The dealer said the air conditioning compressor itself was making the noise and had to replace it, we will see if that fixes things. I pick the truck up today.

There is a differant belt they will put on there that takes the noise away. My was in the shop 4 times for squeaky belt and finally they put this new kind of belt on and it's been good for months.

ok...what is the gm part# so all of us here can relate to it. and to make sure dealers use the correct one thx.

Yah my truck has been there three days down, new PS pump bracket, new A/C compressor, still the squeak persists and they absolutely refuse to put the gatorback belt on because it is not a GM product. So there my truck sits again waiting for the new G/M belt to come in. Anyone else notice that dealers apparently do not stock any parts for these trucks? Everything, even something simple as a belt must be ordered.

well after all that they replaced the belt as I requested originally and the squeek is gone

2006 LBZ less than 3K miles. It squeaked from day one, but only when it first starts or if it is damp or rainy. I talked with my service manager before the end of year one and he said he would replace it if necessary any time in the first 3 years of warranty. Do those of you with squeakies squeak all the time or just at start up? Mine definitely slips on stopping the engine as well. That's got to wear the belt. I'll be happy to supply my VIN for a class action against GM. I wish I had been able to wait for a 2007.5; I am not crazy about the DPF on the LMM, but I definitely like the improvements like Onstar, 17" wheels, folding center seat on the CC, and vertical camper mirrors

Veggie in Silver Spring, MD 2500 CC WT LB stock LBZ

repost, like I said some pages back got the power steering pulley adjusted per TSB then threw on a gator-back have not heard a peep since

repost, like I said some pages back got the power steering pulley adjusted per TSB then threw on a gator-back have not heard a peep since


I would love to throw a Gatorback on, the only problem is that they do not make one for my dual alternator LMM. So much for GM's desire to fix the problem.

2006 3500 Duramax LBZ dually here, bought new in Jan '06.

18,500 miles now, and has sounded like an old washing machine since day one.

It's better when it's warmed up, so by the time I get to the dealer, it's not too bad.

It's a commercial vehicle, so I don't want to leave it overnight.

I thougnt I was the only one, but from what I read here, I guess I'm glad I didn't waste any time leaving it at the dealership.

Count me in.

Hey, what do you want for $45K?

We have a new 2007 Duramax 3500. We've had it for a month. And, the belt made noise almost from day 1. We just had it in today, and they replaced the belt. It is quiet for now. We'll see how long it last. Hopefully for a long time.

I have 4000 miles on my gatorback and quiet as a mouse!!!!

I had the same problem on my 06 lbz got it fixed with a clutched alternator, about 25000mi. ago, no squeeks or chirps since.
(I thought I would let anyone know that had the same problem, the belt chip at shutdown was fixed by my dealer with a new alternator. It is clutched, you can see the alt. pulley looks different. They said there was a TSB-(#1847901) from GM for it, they did not replace the belt. Good Luck!

I had the same problem on my 06 lbz got it fixed with a clutched alternator, about 25000mi. ago, no squeeks or chirps since.
(I thought I would let anyone know that had the same problem, the belt chip at shutdown was fixed by my dealer with a new alternator. It is clutched, you can see the alt. pulley looks different. They said there was a TSB-(#1847901) from GM for it, they did not replace the belt. Good Luck!

take them that tsb# and they sould be able to fix you up. Dont let them know where you got the tsb, and stick to your guns, and all should go well. worked for me:)

If GM has removed the TSB from their system and allegedly claims that this is a normal noise, they really dont seem too anxious to fix their problem. I wonder as a last resort if I can install the standard gatorback belt for the single alternator setup and bypass my second alternator. It seems like a tremendous waste of money and I wonder if it will throw a trouble code if the second alternator isnt functioning but what else can we as group do to make GM responsive?

6 months with Gatorback belt and still quiet as a mouse.

I just bought my duramax & it has the squeeky belt problem. Dealer said they are ordering a different belt. Hopefully it works. Kind of embarrasing with a brand new truck sqeeling like hell. My ford buddies keep giving me crap about it. lol.

I just bought my duramax & it has the squeeky belt problem. Dealer said they are ordering a different belt. Hopefully it works. Kind of embarrasing with a brand new truck sqeeling like hell. My ford buddies keep giving me crap about it. lol.

They replaced my belt and idler arm, squeak got better but not anywhere near acceptable.

i got my 07lbz in feb and been squeking since (11000miles). brought it to the deal and go figure...no noise. might have to try that gatorback

Took my 06 to the dealer for the notorious squeek, they aligned the power steering pump and a new OEM belt, no noise thus far.

The squeeky belt I was told from my dealer is due to the pulleys being out of alignment from the factor. GM will replace the pulleys under warrenty work at no cost.

The squeeky belt I was told from my dealer is due to the pulleys being out of alignment from the factor. GM will replace the pulleys under warrenty work at no cost.
They told me the same thing, then they said it was a bad idler but none of it worked. After about 5K the squeaky belt stopped but I still have the shutdown chirp...

Back to the dealer again. Said they will try the new GM belt this time. Still trying to get them to replace the PS pump bracket. Had to go to the Service Manager to get any movement.

Just got mine back. New belt and some work done to the PSP bracket. Sounds good for now. I'll report back in about 100 miles.

Well its been about 3k since my last trip to the dealer. you can read in the "My squeaky belt saga" that i had my truck in the dealer 9 times before they finally replaced EVERTRHING on the front of the motor, 3284 mi later and nothing.... knock on wood! but the squeek is gone! NOW i have to listen to my brakes squeeling everytime i stop.

The cold start belt squeak/chirp is an issue GM is aware of and and has a couple of service bulletins out on it.

1. Replace Accessory Drive Belt, and/or
2. Replace A/C Compressor / Power Steering bracket or enlarge mounting holes.


On the other hand, belt chirp when the engine is shut off has always been a characteristic of the diesel engine. The belt chirp is caused by the high engine compression and the rapid stopping of the crankshaft

Due to a larger/higher output alternator, the belt chirp on a 2006 diesel engine equipped vehicle may be slightly louder than an older model vehicle.

Some 2006 diesel engines may already have a clutched alternator pulley to reduce the amount of belt chirp when the engine is shut off.

If a 2006 diesel engine equipped (LBZ or LLY) vehicle has a belt chirp when the engine is shut off, and the vehicle does not have a clutched alternator, a clutched alternator can be installed to reduce or eliminate the shut off noise.

If the vehicle is equipped with a dual alternator system (RPO code 8X5), the clutched alternator cannot be used.