07 Sierra Making A Wheezing Noise When Shutting Down?

[kelch420]

Hey guys just wondering what this wheezing noise could be when I turn the ignition off to my truck. Also a my right headlight keeps going out and when I tap on the headlight plastic it goes back on, lol. Could this be a loose wire connection?

[txab]

It could be a loose connection on the back of the bulb, doubt it though. Check it. But plan on replacing the bulb, that's the problem. Have had it happen several times over the years in different vehicles. Filament is broken, then when you tap it, it just happens to make connection and fuse itself back together temporarily. Wheezing..... I'd have to think about that

[03blackz71]

Does it sound like the electric fan maybe? Mine makes a squeal for like a second or two after I turn mine off. I have to take mine in after the first of the year to get checked out.

[salden77]

i thought that noise was normal, my 06 sierra does it everytime i shut my truck off, its more noticeable since i put a cold air intake in. my 2009 silverado 2500hd company truck also makes the same noise on shutdown everytime. maybe its normal??

[compulynx]

Asthma?

 

 

Check for a bad check valve going to one of the vacuum canisters.....

 

C