All warning chimes, door chimes and onstar run through the regular car speakers. You have stock or aftermarket head unit?
Sound Quality/ On-Star Issue
OK a new one I need some help on. I have an intermittent issue with the mid-level sound/ On-Star/back up warning system. Sometimes when I start my truck the Onstar sound level is super low and it sounds as if my door speakers are not working at all, I have no mid range sound just the A-pillar tweeters. Other times it is fine. Also I noticed when I have the issue the back-up sensors have no sound either. Is all of this stuff tied in through the head-unit and through the door speakers? What should I go looking for? I was thinking a loose connection in the head unit speaker wire but I wasn't sure if these are the speakers that the On-Star and backup sensors use.
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If you haven't modified your audio system then it is probably something to do with an onstar module or the onstar system. That is if regular radio/cd music plays through the speakers with no distoration.
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