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I found it is best to use the external mic provided.
Sorry, there was a problem. Please try again later.I had a mic with my Onstar I used the correct pac module but the internal mic did not work. I had to use the mic that came with the head unit.
Sorry, there was a problem. Please try again later.Unfortunately, I couldn't help with any questions as I purchased my stereo in March and the auto tech installation cancelled my appointment and I have been waiting ever since. Sorry
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