Re: Hum from OnStar speaker in roof
I have always wondered why would there be a speaker over my head when Onstar/radio/nav all run into factory amplifier then into doors for sound.Actually there are two above the drivers seat. I'm assuming one would be the "Ambient Temp Sensor" and one a mic for Onstar.Which one is mic and which on is the A.T.S? Pics anyone? I'd like to tap into the Mic.
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