wierd noise from rear tire area

[rosskie]

Hey everyone,
New to the forum and already have found some great info. I do have a question that I couldn't find the answer to though. Usually when I start the truck, I can hear a noise that sounds like a small air compressor from under the rear end behind the wheels. Any thoughts or ideas? I just bought the truck and it does not have an owners manual. Also have a tire pressure sensor warning on the display. Are they related and is there an easy way to make this go away. Oh, I have a 2006 yukon denali. I love it so far. Thanks for any help I can get.

 

[metro273]

My guess is that you are probably hearing the fuel pump, at the rear of the vehicle?
No, it's not related to the tire pressure light being on.

 

[02cadiHOE]

it could be the rear air ride system on the denali.

 

[dave/angie]

Not sure on the Denali, but on most late model GM's, when you turn the key "ON" you"ll hear the fuel pump pressure up for about 2 seconds, then it shuts off until you start the engine.

 

[rosskie]

Thanks for the info

I don't believe it is the fuel pump. The noise starts after the truck is started and only runs for about a minute or so. It is way louder than a fuel pump noise. Probably air ride. I am not sure if my truck has it or if it comes standard. Thanks for the info. I will do more research.

 

[Gordo]

its the air ride suspension i got the 03 denali and yo can see the compressor from the drivers side rear tire well

 

[blackberry addict]

I was wondering what that noise was..