'01 DMax...The best DSL I've owned...'till now.At 96K trouble started with injectors. Local dealer replaced two. Soon as I picked up the truck, I noticed what sounded like a low rod knock and lifter tick. I was on the road and two diff GM dealers said it was "OK". Now the noise is worse and it's past the warranty (102K). I would like to keep the truck but I'm leary of on the road trouble. From what I've read here, it could cost about 5-8K to have it repaired. What really burns me is the noise, I bought the rig for the quietness of the DSL. Now it sounds like my old Power Stroke. My question is this: Should I replace the injectors (if it is the injectors making the noise) and keep the truck or trade for a new DMax? I really like the truck.

The dealer is supposed to change all 8 if there is a problem, I would take it back where you had the work done and get it fixed right.


If the dealer gives you any crap I'd call costumer service at GM and tell them what happened.


I think with it being that close they will most likely take care of it for you.


Also read somewhere on this board about 120,000 mile warranty on injectors.

Some noise is normal .... Do you run any additive or additional finer filtering ??


I will have an occasional knock and other times it's quiet as can be ...


I can tell you my balance rate is well with in exceptable tolerance now since running additive and a 2 um filter regularly ...


Mac

I would certainly try to make a case for having the work done under warranty. Present it as a continuation of issues that began while warranty was still valid. Call GM customer service, and if you can pursuade them to help you then demand to have a well experienced Dmax tech do the work. Internal engine problems are pretty rare, there is a good chance that injection is the only problem you have even if it sounds mechanical. --SS

"I noticed what sounded like a low rod knock and lifter tick."

Haven't had any injectors replaced but I have the same noises. The engine is noticably louder at 71,000 miles than it was at 10,000. The low rod knock sound has me worried as it's apparent at idle than just into the beginning of acceleration.

But hey.... there are members here, well at least one, that have had multiple Dmaxs passing 300,000 and 400,000 with nothing but praise.

Mine has a tick at idle, been there sense it was new.


Eric listened to it and said he hadn't heard this noise before.


He ran a balance check on the injectors and all were good, so the noise is a mystery for now. Hopefully it don't blow up. But if it does the General will have to fix it.

I would definitely push the warranty issue w/the dealer; let them know the names of the 2 dealers who you saw while traveling, and don't take no for an acceptable answer.

Would an oil analysis tell something about the condition of the bearings? I'm sure you don't have a base line to work from but if you're losing a bearing would think that would show up as pretty obvious. If it's an injector, should be seeing some diesel in the crank maybe? Where has everyone got their oil analysis done on there motors?

I'm sure what he's hearing is an injector "knock" ....


If your interested in an Oil Analysis a kit can be aquired here ... http://store.avlube.com/index.html


Mac

THX for the replies and PMs. I need another DSL but would also like to keep this one. If the culprit is the injectors, maybe I could get GM to help out. THat would go a long way towards staying with the DMax.

Dropped truck at local dealer. Service writer says it needs a fuel pressure regulator. $1100.00. They have a truck I want in stock, but doesn't have the LLY. Is the LLY worth waiting for? KT

I hope they will cover it under warranty. You did have the truck in there at 96K and they should have found the regulator problem then.


Don't take "sorry your warranty is over" for an excuse to charge you for it.

Dropped truck at local dealer. Service writer says it needs a fuel pressure regulator. $1100.00. They have a truck I want in stock, but doesn't have the LLY. Is the LLY worth waiting for? KT





High idle, more low end torque, and external fuel rails are the ++'s


No peformance mods available and a weaker tranny if you want to mod are the --'s, from what I have read here.


You might like that high idle when it get's cold, but that's an easy add on to an LB7 too for about $30.


So how does a pressure regulator cause a knock?

So how does a pressure regulator cause a knock?


Good Question...The Service writer said to 1st replace the regulator, then see if noise goes away. My guess is it won't, and it will cost more to go in and replace injectors.


Customer service tells me since I do my own maintence, I can't prove I've serviced it properly...so it doesn't look good so far. Looks like I'm going back to Power Strokes....

I think all you would need is a log of the maintenance you have done that covers the items that would effect the motor/fuel system. Fuel filters and oil changes are about all that would need to be covered.

KT7307
Absolutey wait for thr LLY ...You'll see why when you drive it.

___________
04 LLY GMC 3500 Crew Cab Loaded, including TV in the back

I would look for a better service department .... Unless your conveying the message different I don't have to much confidence in them and it isn't my truck ....


Sounds to me like their throwing money at it ,your money,without proper diagnostic capibilities ....


Good luck and wait for a LLY .... Forget the 6.p0s .... GM is way ahead in reliability IMO since the intro of the Furd ....


Don't be drawn in by their plush service department waiting room ,it has to be comfortable for all the time you'll spend there watching daytime talk shows and soap operas ...





Mac Edited by: Mackin

I'm being offered 21,000 trade. Is that reasonable?

72,000 miles?

I'm being offered 21,000 trade. Is that reasonable?

72,000 miles?


Where at FMC lot ??


Watch out HOOT I heard that Furd was trying to buy them up cheap to use as loaners for the Contracters when their trucks are in for service over and over and over again ....





Mac http://www.dieselplace.com/forum/smileys/HiHi.gif

I have 83K miles now and just added the Nicktane kit and the TFI 56 gallon tank. I noticed my truck getting a bit "louder" around 30K but has not gotten louder since. Like Mackin stated, Some days are quiet as can be, others are a bit louder. Not sure why but it has not created any problems. I have not used any 'Power Box enhancers" ever as I am quite pleased with the trucks performance as delivered.


Now here is a weird deal, I got a letter from GM stating that "GM did not meet some goal and said my truck was a desirable truck and they would give me $4K towards a new truck. This $4K was on top of any other incentive GM might be offering. They told me to take my truck to the dealer where I purchased it and they will appraise it accordingly and give me that dollar amount +$4K + the $3K GM rebate towards the purchase. This seems very unorthodox. I called the dealer and they said it was legit. At this time I am not considering this trade as my truck runs just great. Matter of fact I just made a bonzaii road trip in a day and drove round trip up near the Oregon border and back.With Cruise on at about 68-70 most of the time, I average 19.7mpg....not bad for 3500 4x4 CC Long bed dually.


Again the automarket is a self fulfilling type market, they tell you to buy up, all the while you take this severe financial loss as the car depreciates. I say drive the thing til the wheels fall off. Fix it when it breaks, maintain it well. Putting $2K or $3K to keep it tip top shape is a lot better than buying a truck for $50K and having it be worth $35K next year. That does not count the interest you are paying to the loan. Do the math.....http://www.dieselplace.com/forum/smileys/Cry.gif


One other thing on the bearing material, I highly recommend buying a Tavia oil filter cutting wrench. I cut a filter everytime and find it to be exceptionally clean. I even cut the Alli unit.


Carry On and "Don't believe the hype"

Duramax Dually...

The $4000 they are giving you. Is that after you haggle invoice price.

Lets say...

Sticker... 40,000
Invoice... 37,000
-4000
-3000

30,000 + your trade value?

Mike

Mike,


Well on paper(and in principle) that is what it appears to be, I did not dig any deeper....However a new '04 around here is not even close to $40K..LOL...add a big $10K spot to that figure plus Tax and dealer prep and all the other hidden costs..LOL. I do not care how good a negotiator you are, they still get you one way or the other.


Jeff

GM turned me down flat...Service manager stated I had not contacted him prior to warranty running out. I directed the nice lady to the service writer...not the service manager. Then I called the service manager and explained what was going on. He was going to speak to my service writer and get in touch with customer service.


I'll keep you posted....THX for the input KT

Wow man if they gave me one of those $4000 certificates then I actually could afford to buy a new truck... Heck they should just drop the prices 10k on all of them and call that good...http://www.dieselplace.com/forum/smileys/Clap.gif

After a few more phone calls, My local dealer replaced the fuel pressure regulator and the General paid for it (all but $171.XX). The truck has always had an Idle surge...but I was used to it. The regulator fixed the surge, but made no diff in the injector knock. I don't know if I'm being unreasonable, but I'm still not satisfied. After driving my co-workers DMax, it frustrates me to drive my rattler. If I could get the 4K incentive mentioned above, I would trade in a heartbeat. But the most they will offer is $15K. I wouldn't feel right selling it to someone knowing there was something wrong under the hood. The other option is paying to replace all the injectors, that is a hard pill to swallow.Hope it doesn't sound like I'm http://www.dieselplace.com/forum/smileys/Cry.gif just venting...KT

So did GM say they wouldn't foot the bill for the injectors? If so, that's just not right! I would have a hard time ever doing business with a company again over something like that. I've permanently boycotted companies for a lot less than that.

Q. Does the "lemon law" apply to cars past their warranty period?

A: Generally, no. The exception is where the defect arises within the warranty period, and is not fixed within the warranty period, and the consumer gives the manufacturer and dealer written notice within 60 days of the last unsuccessful repair attempt for the defect. In such a case, the warranty is extended as to that defect until it is repaired.

http://www.brennanlaw.com/index.htm

You may not want to hear this, but there are a lot of lwyers out there that have good advice in this area and there are also tricks they are aware of you and I do not know of.
Contact one get som efree advice ( usually the first call/visit is free). Often times it it settled with a phone call/letter fron the lawyer.
Don't get me wrong here I know people sue fro hot coffee, but when you have a real bitch and they play the warranty game to the letter, it's time to fight ire with fire.
If you were in Ca. I would give you a great shark. Check out his site anyway.
He got Ford to give me a new truck after three years of fighting with them. I drove the old truck for free for three years, got a new truck, and they threw in a 100k warranty on the new one and it did not cost me a dime.

KT7307, YOU HAVE MAIL!! Howard http://dieselplace.com/forum/smileys/Clap.gif http://www.dieselplace.com/forum/smileys/Clap.gif

GM customer service supervisor was flat out NO!!!!! I did how ever recieve a very helpful PM advising another option. I'll post the results. THX KT

After a few more phone calls, My local dealer replaced the fuel pressure regulator and the General paid for it (all but $171.XX). The truck has always had an Idle surge...but I was used to it. The regulator fixed the surge, but made no diff in the injector knock. I don't know if I'm being unreasonable, but I'm still not satisfied. After driving my co-workers DMax, it frustrates me to drive my rattler. If I could get the 4K incentive mentioned above, I would trade in a heartbeat. But the most they will offer is $15K. I wouldn't feel right selling it to someone knowing there was something wrong under the hood. The other option is paying to replace all the injectors, that is a hard pill to swallow.Hope it doesn't sound like I'm http://www.dieselplace.com/forum/smileys/Cry.gif just venting...KT

15K? What truck do you have?

My truck shows $21,000 on KBB.com dealer trade. Two dealers were willing (Dodge) to give me that much and sell the new truck to me at invoice minus $2500 rebate. Now I'm not suggesting you go to a Dodge dealer but 15K is a joke. That's what they offer for non diesels.Edited by: hoot

'01 GMC White / DMax / 102K / Ext Cab / SLT / On Star, Heated Tan Leather / CD / 4X4 / 8 foot bed / No Modifacations / Nice Truck except for the knock......Dealer offered $15K firm, on trade.

The Mrs is 300 miles from home and the SES Lt came on and truck won't run over 1800 RPM. Seems identical to previous injector symptoms.


If I $ up to replace all injectors will this resolve the issue? I have read posts where guys were on thier second and third set of injectors. What a shame......http://www.dieselplace.com/forum/smileys/Dead.gif

Here is the bulletin to replace all 8 injectors. Unfortunatly, you took your truck in before the bulletin was released. So even the 2 injectors you had put in are not the new part number probably.



<H1>Service Engine Soon (SES) Light, P0087, P0093, P1093, Low Power, No Start, Hard Start, Fuel in Crankcase (replace All Injectors - New Strategy for High Fuel Return Rates) #04-06-04-007A - (04/07/2004)</H1>


</TABLE>Service Engine Soon (SES) Light, P0087, P0093, P1093, Low Power, No Start, Hard Start, Fuel in Crankcase (Replace All Injectors -- New Strategy for High Fuel Return Rates)


2001-2004 Chevrolet Silverado


2003-2004 Chevrolet Kodiak C4500/C5500 Series


2001-2004 GMC Sierra


2003-2004 GMC Topkick C4500/C5500 Series


with 6.6L Duramax™ Diesel Engine (VIN 1 -- RPO LB7)


This bulletin is being revised to clarify the Warranty Parts Center Information. Please discard Corporate Bulletin Number 04-06-04-007 (Section 06 - Engine).



<H4>Important</H4>


Before the technician begins diagnostics and repair, be sure to follow the guidelines in Corporate Service Bulletin 03-06-04-036 to avoid fuel system contamination.






<H4>Important:</H4>


'GM of Canada' dealers are required to contact the GM Technical Assistance Centre (TAC) to review the completed diagnostic worksheet and obtain a case number prior to injector replacement.


<A name=ss1-1491693><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1491693&amp;pubid=210&amp;evc=sm#ss1-1491693" target="_blank">
<H5>Condition</A></H5>


Some owners may comment on the Service Engine Soon light becoming illuminated. Upon investigation, the technician will find DTCs P0087, P0093 or P1093. Additional customer comments may include a lack of power, a fuel smell on the oil dipstick, fuel in the engine oil, fuel coming out of the crankcase breather, the engine cranks but does not run, or a hard start condition. This condition will not cause an engine misfire. Do not apply this bulletin to any diagnostic other than what is identified in the chart below. <A name=ss2-1491693><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1491693&amp;pubid=210&amp;evc=sm#ss2-1491693" target="_blank">
<H5>Cause</A></H5>


The fuel injectors have internal conditions that may cause them to return an excessive quantity of fuel to the tank, as well as leak fuel into the crankcase. Due to the return flow and/or leakage, the fuel injection pump may not be able to build up adequate fuel rail pressure. <A name=ss3-1491693><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1491693&amp;pubid=210&amp;evc=sm#ss3-1491693" target="_blank">
<H5>Correction</A></H5>



<H4>Important</H4>


Before the technician begins diagnostics and repair, be sure to follow the guidelines in Corporate Service Bulletin 03-06-04-036 to avoid fuel system contamination.





Follow current diagnostics for the condition the vehicle is experiencing, then reference the table below. If the diagnostics lead to Fuel System Diagnosis - High Pressure Side, follow the diagnostic until the Fuel Injector Return Flow is measured at each cylinder bank return connection (bank to bank).



<TABLE width="100%" border=1>
<T>
<TR>
<TH align=middle>


Condition </TH>
<TH vAlign=bottom align=middle>


Start with this eSI Diagnostic in the Diagnostic Information and Procedures sub-section of the Engine Controls Section</TH></TR>
<TR>
<TD vAlign=center align=middle>


Delayed Start</TD>
<TD vAlign=center align=middle>


Hard Start</TD></TR>
<TR>
<TD vAlign=center align=middle>


Lack of Power</TD>
<TD vAlign=center align=middle>


Lack of Power, Sluggishness or Sponginess</TD></TR>
<TR>
<TD vAlign=center align=middle>


Engine Cranks but Does Not Run</TD>
<TD vAlign=center align=middle>


Engine Cranks but Does Not Run</TD></TR>
<TR>
<TD vAlign=

Replaced all 8....Eng is quiet and runs good! Hope this issue is put to rest. I'm still very satisfied with this truck. Now, I nned a Dmax Tahoe http://www.dieselplace.com/forum/smileys/Big Smile.gif

KT7307 - was this recent injector replacement done under warrenty or did you have to pay?

I didn`t find this in time to tell you to get in contact with Eric. He is just 500 miles from you. And that isn`t bad.


Glad you got it takin care of. Hope that is the end of all problems for quite some time.