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Intermittent Whistle from A/C

Intermittent Whistle from A/C

Postby Renegade [OP] » Jul 29 2012, 8:34pm

I have a 2008 Silverado and have noticed a intermittent whistle when the A/C is on and the truck is in motion. Has anyone else encountered this? Maybe air is going though the vents in a weird way causing it to whistle or might be the filter for the A/C. I don't know, but if anyone has any ideas, please let me know because it gets annoying on long trips.
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Re: Intermittent Whistle from A/C

Postby Z15 » Jul 29 2012, 8:43pm

It might just be the air leaking past a window or door seal. Sliding rear windows are often the source. There is no filter in the HVAC system
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Re: Intermittent Whistle from A/C

Postby Subtlebrick » Aug 14 2012, 12:37am

I've got the same thing, did you figure anything out renegade?
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Re: Intermittent Whistle from A/C

Postby country1911 » Aug 14 2012, 2:22am

It's not a whine like the motors on the fan make when they are going out is it?
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Re: Intermittent Whistle from A/C

Postby Subtlebrick » Aug 14 2012, 4:34pm

In my situation when I have the AC on full blast and am standing next to the driversidenpassenger window I can hear and feel the air leaking ou at the bottom of the window
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Re: Intermittent Whistle from A/C

Postby JUSTINKP » Aug 14 2012, 4:59pm

This happened to me in my 2005 Colorado that I used to have. I know exactly what you're talking about. The Colorado had a service bulletin about it, but my dealership at the time stated they could never "reproduce the sound and the issue" so they wouldn't do anything about it. Meanwhile, when I went to leave the dealership, the a/c made the whistle sound and the service advisor still claims he couldn't hear anything.

Good luck getting it fixed if you have a stealership like the one I used to deal with. (That's one of the reasons I switched Chevy Dealers when I bought my Silverado)

Im not a mechanic, but I do seem to know a good bit about vehicles, and I don't believe that whistle is anything major, but it's still kind of annoying at times and it's always in the back of your head too.
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Re: Intermittent Whistle from A/C

Postby Tec3 » Aug 17 2012, 4:51am

hey is it coming from the driver right side, if so there is a recall or a bulletin. we at the dealer have been replacing that vent.
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Re: Intermittent Whistle from A/C

Postby slmaleski » Sep 27 2014, 11:00pm

Hey; Did you ever solve the whistling sound? I have the exact same thing on the right side of my 2006 Silverado. very annoying
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