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Old 07-26-2004, 02:59 PM   #7
bardorfm
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Join Date: Jul 2004
Location: new city, New York
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2004 Denali Whining noise

I own a 2004 Denali and have been experiencing the same problems as I have read here. My Yukon makes a whining noise when accelerating as well as when cruising at say 40 mph...once the truck has shifted into the final gear. I've taken ot to the dealer 4 times and they finally diagnosed it as an exhaust problem and what I'm hearing is actually air passing through the muffler system (didn't seem right to me). In any case, the dealer threw a set of dampers on the exhaust in front of the muffler. Well, it didn't stop the noise and now they want to put another set behind the muffler...at the recommendation of GMC customer service.

It seems to me that the dampers have killed my power a little bit, so I'm hesitant to add the second set.

Any thoughts to adding these dampers...sounds like it may not be an exhaust issue at all!

Thanks,

Mike
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