2005 Yukon -- Strange Noise at 35-45 mph

[threejet]

I’m in need of some expert advice…

I have a 2005 GMC Yukon SLT 4WD with all the goodies. I purchased it back in August 2009 with ~30K miles. It was a certified used car and was in great shape.

However, soon after I took it home, I started to notice a noise when I was traveling between 35-45 mph. For a lack of a better term, it sounds like a “diesel” engine type noise…on low volume. This noise seems to only occur when I’m traveling between 35-45 mph and only when I have very little pressure on the accelerator. If I press harder on the gas, the noise disappears. The same thing happens if I let off the gas. The noise usually comes and goes pretty quick, as I can’t get it to last longer than say a few seconds.

I’m going to take it into the shop, but I wanted to be prepared. Has anyone else experienced this type of noise before, and if so, what was it?

Thanks for the help!!!

 

[My01yuk]

Can't say that I have but with 30K on the clock and it being an 05 I find that strange. Still under warranty right?

 

[threejet]

Yes...still under warranty.

I've got about 1500 miles left of the 12month/12,000 bumper to bumper deal. The powertrain goes for 5 years/100,000 miles. That starts from initial delievery...which was July 2005. So, I'm covered until this July on the powertrain.

I was just hoping someone else had noticed a similar noise when they were under (ever so) slight acceleration...while traveling between 35-45 mph.

 

[rich5368]

I've got it in my denali but it stays there. Like a scraping noise. Let me know what the shop tells you. It has me stumped.

 

[Tribalbreak]

i have a very similar sound coming from my 03 nali... definatly keep us all posted... some one told me it was bad cats but i want to know for sure before i shell out the coin for cats

 

[rich5368]

Looking through the net I keep getting the answers of 1. Front diff Carrier bearings. 2. HUB. 3. Front diff needs rebuilt. I dropped my front diff oil and there was some shavings and a few slivers in it but nothing that was glaringly unusual for a vehicle with 115k miles. Putting it in the shope next weekend to have it looked at.

 

[Tribalbreak]

mine sounds more exhaust oriented... it has to do with rpm for me...

 

[rich5368]

Yea mine doesn't vary with speed or rpm. It's just there on the gas and gone when I'm off.