Well I took it into the dealer today.....they weren't able to fix it, but will call it in to the gm techs next week to see what they have to do to fix it. I'm 99% sure that it was calibrated wrong from the factory & the original owner didn't know any different. Hopefully they'll be able to recalibrate it & it will sound better. I also got my drivers side mirror replaced & the straps put on my muffler - had the same thing done to my truck. GM really needs to do something bout these mirrors. My inlaws are in town & their mirrors are shaking & the drivers mirror (which was just replaced in October) isn't working again.
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