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OnStar Mic always hums?

GT_80

Full Member
Joined
Mar 17, 2014
Messages
305
Location
North Central Massachusetts
HI, my 2004 Avy has the Onstar mic over the drivers head in the headliner (at least I assume it's the mic), and it always buzzes- actually sounds like something spinning almost like an electric fan with the blades dragging on something... It does it all the time when the truck is running. Any ideas? I do have an aftermarket stereo- Pioneer with Nav, Bluetooth, backup cam, DVD... Not sure if that has anything to do with it...
 
makes sense! i guess i'll leave it alone as it works for now. so is the Onstar mic the oval shaped black thing next to the overhead console near the map light button?
 
Believe it or not that is a very common question here.
 
I'm glad I discovered this thread.  I bought my 2006 only a few months ago and have been wondering about what I now know is the Onstar mic and the fan, er, temp sensor.
 
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