Hello, I'm new to this forum.... I appreciate any feedback.

My 06 dmax has had this problem since about 10,000 miles or so. Had it to the dealer three times, no luck yet. Wondering if anyone else has this happen:

This sound happens after driving enough to bring the drive train up to normal operating temps, and most always after getting off a highway after driving a long distance. After I take my foot off the brake and coast for a bit then apply the brake while still in high gear (allison auto) the truck makes a very loud whine (no turning, straight line), almost like a power steering whine, but can be felt under my feet.

After stopping and then taking off turning, the whine is very loud. I had it in to service where they replaced a power steering part claiming there's a service bulletin out stating that the power steering pump causes the whine. The dealer replaced the parts but it still does it. Of course the dealer says nothing is wrong.

The truck has 34,500 on it with no extended warranty so I'm anxious to get this taken care of, especially since I will be at 36,000 miles whithin two weeks.

Anyone else having this same thing happen? Thanks.

Check your wheel bearings. Jack it up and rock the wheel in and out from top to bottom. If there is any play it is garbage.

I've had the same noise out of mine a few times. Always when towing a nice long distande and getting off at a ramp. So far, I've ignored it and I may be trading it in on Saturday but I have heard the sound and I'm SURE it is the same one.

You are right in that I think it is hydra-boost/PS related exactly like a pump whine.

If they have worked on fixing it, do you think they would be able to do something even after the warranty is up??

Think you MAY want to push it at this point but if they can't duplicate it, that's a tough one!!

Ken

Ditto mine also always when towing it fells like power steering growl coming thru the Brake pedal.:exactly: But this is my first Duramax:ro) and it rocks I cummins from the dark side. 06 LBZ CATLESS 4" Tough Country.

Only time I've gotten the "growl" out of the steering is when it's hot out & I've been towing the TT. Only time it's noticeable is when backing the TT up & having the maneuver the steering back & forth. I've heard that flushing the PS pump out & replacing the PS fluid with full synthetic helps, probably try it later this summer..

So Little Time, I would like to know what truck, year & model you have. I have also had Power Steering whinning/growling. I would like to know about the service bulletin on the P/S. Anyone else ever heard or know about a buletin out on that?

Now, I haven't any transmission problems of any sort. But the peice of advise that I might pass along to you is get a copy of the service record from when you took it in because of the transmission. If you can't get that for some unknown reason, make sure that you take the truck back BEFORE 36,000 miles & tell them again & be sure you get a copy the service writers notes so you will have something to show GM AFTER 36,000 miles incase they don't fix it this time. But try, try to get a copy of the service report from your last visit to show you had the problem before hand. You may already have it. They sometimes give you a copy when you pick your truck up. Let us know.

Glad to hear Im not the only one with that whine. Have 2006 dually extended cab with 5,800 miles on it. Mine make's the same noise when good and hot especially after getting of freeway or climbing in mountains. We live in Palm Springs, Ca. and temps can run over 110 degrees in summer. Noticed the same noise yesterday when I got off freeway and comming to a stop, it was 114 degrees trans was running about 210. Im going to change the trans filter today. Im concerned about trans temps to don't know if running that hot is ok. If any one has answer please let me know. Thanks B4ur ;)

I have a 2006 2500HD CC with about 5000 miles on it. I get the same loud "whine" after towing on the highway for a long distance and then pulling away after stopping. The whine is not transmisson related. If you slip it into neutral, the noise follows the engine RPM. I think it is power steering related?

Mine does the same thing. I think that its the brakes. Mine only does it after long runs while towing and coming to a stop.

Thanks for the replies - sorry I haven't checked this thread, I've been out of town.

My truck is a 2006 2500HD crew/short bed 4x4. Although the dealer paperwork shows that the ps pump was replaced (the ps fluid all over tells me it was replaced), it has done nothing to correct the problem. I believe the problem is two-fold: the ps pump is either not big enough to do the job, or has some inherent problem with it because when it gets to operating temps, turning the wheel while slowly accelerating makes a very loud whine. The second issue I believe is in the trans itself. After long highway miles coming off an exit ramp while still in high gear and the brake is applied, the whine is loud and can be felt through the floor board and pedals. But if the trans shifts down to coast, it won't make the noise when applying the brake. This trans whine can best be described as close to the sound of an overloaded hydraulic pump.

The other problem is my truck has only 400 miles left on the factory warranty, which I'll put that on in the next 4-5 days. If I can't get it into the dealer this week, I guess I just live with it and hope for the best.

Anyone have experience with getting an issue fixed after the warranty expired that was unsuccessfuly worked on before warranty expired?

Mine does the same thing. I think that its the brakes. Mine only does it after long runs while towing and coming to a stop.

I also had the whine twice when towing in hot weather, once when not towing. It sounds just like an overstressed powersteering belt, but it is definitely associated with the brakes. I just got back from a 2500 mile trip and it didn't happen once. I talked to the dealer about it before I left, but never took it in because I couldn't duplicate it. If it happens again I'm going to take it in to be checked out and get it on the record. Mike Z

I to have had the same problem with my truck. Even though Im not 100% sure if its just a problem or what???

When I slow down from the interstate or after i have been climbing the mountains here in Colorado when slowing down from the entrance ramp i get the "ERRRRRRRrrrrrrrrrrrrr decelerating power steering noise and can feel it in the brake pedal as well. It sounds like power steering but it maintains the same contstant deceleration noise as you come to a stop. Has anybody ever tried having the tow haul mode on and does it change tones when it down shifts though the gears (IE: as engine RPM changes??) I only have about 1,500 miles on my truck and its already done it a couple of times since I have had it.

Since both rely on pumping fluid, I thought it was something more related to the Transmission / TQ converter?? Could this be a possibility?

Mine does it too.... I have only noticed it when I am pulling a trailer and deaccelerating.

i have been thru this with my 04.5 lly. A partial fix seems to be fitting a power steering cooler from an 8.1L application 2500hd whiich my dealer did and then running a full synthetic i.e. royal purple or red line. G.M.,s fluid is a partial synthetic only. I have been having some issues with parking lot manouevers and feel pump no 3 may be weak. This system is under engineered for the front-end GVW especially with the 6.6l. I have been trying to find out if the pressure control valve is adjustable.
Laker

I did notice how ever when I started up the truck (it was already warmed up to normal operating temp). When I went to back up out of a parking spot the steering wheel did seem kind of tough to turn but have not experienced it since. Could this be due to the pump operating at high speeds for long periods of time and its just a defect from the engineering?

I have the exact same noise with my 06 LBZ and only 400 miles.
I hope somebody can get this issue figured out.

Took the truck into the dealer today (different dealer from where I last had service done). They of course could find nothing wrong with the truck. So, with the warranty about to expire, I guess I'll roll with it until something breaks. If anyone finds anything out about this, please let us know.

Just took truck in, 650 miles, for GPCM Reflash, mentioned Power Steering groan.
Needs a pump!:eek:
Goes in Monday AMCensored
Crew Cab with a July 17 '05 build date. Flint Plant,
Anyone else in the "neighborhood"? Maybe they had a bad batch of pumps...


I to have had the same problem with my truck. Even though Im not 100% sure if its just a problem or what???

When I slow down from the interstate or after i have been climbing the mountains here in Colorado when slowing down from the entrance ramp i get the "ERRRRRRRrrrrrrrrrrrrr decelerating power steering noise and can feel it in the brake pedal as well. It sounds like power steering but it maintains the same contstant deceleration noise as you come to a stop. Has anybody ever tried having the tow haul mode on and does it change tones when it down shifts though the gears (IE: as engine RPM changes??) I only have about 1,500 miles on my truck and its already done it a couple of times since I have had it.

Since both rely on pumping fluid, I thought it was something more related to the Transmission / TQ converter?? Could this be a possibility?

Seince there is no vacume on a desil the power brakes usualy get presure from the power stering pump. this could explain the sound while brakeing. As for the transhmision I was told there was a100,000 mile power traim warinty.

I'm curious as to what trans temp reading you are getting when the whine starts. I'm thinking that (1) You need to flush the trans, (2) flush the cooler lines, (3) replace the trans filter, and; (4) go to a synthetic.

I'm having no problems but now, since the new (read heavier) 5vr will be here soon, I'm gonna have to keep an eye on the trans temp and listen for a whine!

Anyone else run into this problem and have it correctly diagnosed (read fixed) by their dealer?

WhiteSilverado,

The whine is related to the PS pump.

I know that the LLY I had didn't do it but the new 06 does.

mine does the same, it's loudest during parking lot speed turns after a long highway run.

The new 06's use the the power steering pump for braking boost that is your whining noise.

Mine also does this same noise. I figured it was something to do with the PS pump because when getting off the highway it gets noticably louder when accelerating on a up hill ramp while turning. If you have the truck in park and rev the engine you dont really notice it until you put pressure on the steering wheel.

My 06 LBZ does it as well.. I don't notice it at all unless I'm towing. I get a whining noise (sounds like PS or trans pump) and when braking, the noise gets MUCH worse. I'll be at the dealer tomorrow and expect denial because my 06 Denali had a trans whine that apparently only I could hear. After numerous returns, they finally replaced the trans under "customer satisfaction".. and the whine was gone forever. Now I buy a new truck, and within 1200 miles, am complaining of a "whine" again. I dread that the dealer will just label me as a complainer..

or a whiner... LOL Joke!!!

Who has changed over to a full synthetic fluid? How far did this go to solving the problem?

http://dieselplace.com/forum/showthread.php?t=102840