05' Denali engine noise

[JT824]

I have a 2005 Yukon Denali XL, 6.0L, all wheel drive. I have noticed a whirring sound coming from the engine when I accelerate between 40-70 mph. I have taken it to the dealer several times but they can't seem to find the problem. One on occasion they said it was the front differential, so I had that replaced, but I continue to hear the sound. Again, it happens under load or when accelerating. Once I take my foot off the gas the sound stops or going down hill. My SUV is all stock. Any ideas or suggestions would be greatly appreciated.

 

[ebxgsxr]

i think i'm having the same problem on my 2001 denali. i had it at the shop today. they told me it was the bearings. so i replaced both hub assemblies. but the noise is still there. they said to bring it back, so we will see what they say next.

 

[popo8]

my 02 escaladr does it also... sounds like the diff or whatever the transfercase is called on an awd...

def not wheelbearing.... but a pinion bearing would act the same way under load...


Larry (Popo8) Co-owner
LTXtech.com

 

[CEN2MENTAL95]

I have a sound on my 05 denali when in motion but I think my noise is due to my goodyear LS2 tires (road noise) not engine related noise.

I do know either the efans or the compressor stay on even after the truck is turned off (for a few min)

 

[ebxgsxr]

One on occasion they said it was the front differential, so I had that replaced, but I continue to hear the sound..

what exactly did you replace?

 

[B0$$MAN]

I've got the same problem on my 2002 GMC Yukon Denali.

I've replaced both from wheel bearings, I had my front differential rebuilt because of the notorious "popping" sound over bumps at slow speeds, I had my rear differential rebuilt as well, so it can't be any of those things. The noise appears to be a rubbing or grinding sound only when I am on the throttle, the moment I let off, the noise goes away.

SUPER annoying.

Can anyone help?

 

[B0$$MAN]

bump

 

[01yukonslt]

i know this is a long shot but could the noise be power steering pump whine? i have a weird noise similar to what you are saying and only under load conditions and im 99% sure that my pump is going out as you accelerate its spinning faster making more noise makes sense to me?

 

[B0$$MAN]

i know this is a long shot but could the noise be power steering pump whine? i have a weird noise similar to what you are saying and only under load conditions and im 99% sure that my pump is going out as you accelerate its spinning faster making more noise makes sense to me?

You could be right.

The noise only occurs when on the throttle. It's super loud between 20-45mph and goes up as the speed goes up. After 70mph, you can't hear it anymore.

The noise is also there when braking. The only time it goes away while the truck is moving is when you're totally off the brake and throttle.

It could be the power steering gear box. I think I am going to order it and try it out. First I'll take it to a shop to see if that's the problem cause the gearbox is right around $400.

What I don't get is that this has been going on for a ton of miles; You'd think that it would have given out by now.

 

[ebxgsxr]

but if the gear box is the problem wouldn't there be any other symptoms?

a local 4x4 shop is going to take a look at mine after they finish my Jeep. he seems to think it could be the carrier bearing.