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1991 Eldorado (Gone) ; 2001 Seville SLS (RIP) ; 2005 DeVille
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228 Posts
Discussion Starter #1
My car (01 SLS) occasionally has this really high pitched, but faint, squeak noise. It sounds like I have a damn mouse trapped in my car.

* It only happens when the engine is running, though.
* Does not occur with the key in the on position (engine off).
* It still occurs with the engine running and the radio shut off.

The most annoying part is that it's such a high pitched that it's nearly impossible to locate it.:banghead: I do believe it is somewhere on the drivers side, though, Inside of the car.

Anyone ever run into this? :hmm:
 

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2010 Black Cherry CTS AWD
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263 Posts
I did, it was a mouse. Just kidding, I have a little buzz around the climate control area but I think it's just the CD player. If I hear or read anything similar to what you're talking about, I'd let you know.
 

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White Diamond '03 DHS (with DTS floor shift)
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86,793 Posts
If it is coming from inside the car on the drivers side, use a stethescope or a length or rubber hose to your ear and listen to the small 1" square grill to the left of the steering wheel. That is the asperator. It draws in cabin air to sample the tempurature for the climate control. I believe there is a small fan in the line that could be making the noise.
 

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1989 Fleetwood FWD / 2000 ETC / 2000 STS / 2006 STS V-8 1SF RWD
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475 Posts
Hello...

Ranger is correct. Listen for the aspirator. It is a small fan that inducts cabin air.
However, the noise that mine makes is lower pitched...
-more like a fan "whirr" than a higher pitched mouse squeal.
It only makes the noise when it is cold (40 degrees or lower) and stops when the cabin has warmed up.
I haven't replaced mine yet, but research indicates that it should be fairly easy.
Also, you may want to listen to the fan for the rear passengers.

Are you sure it's coming from inside?
I don't know how loud a power steering belt would be.
 

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Registered
1991 Eldorado (Gone) ; 2001 Seville SLS (RIP) ; 2005 DeVille
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228 Posts
Discussion Starter #5
I'm pretty sure it's coming from the inside. As for the temperature intake deal, I will definitely check it out, as it sounds promising.

But the one thing I forgot to mention is that I still hear it when I turn off the climate control. Could the sensor still be pulling in air even in this scenario?

I will however grab a piece of tube from work tomorrow and give it a shot next time it comes up.

Great ideas so far!
 
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