Yea, the pain of GM cars. Most cars after 2001 have had issue with this. (Dalton excluded) The real horror is that in some GM cars, the AIR BAGS are run thru the factory radio and if you want to replace the factory radio, you need to relocate it due to if your car got into a accident, the airbags would not release if the radio was not in the car.
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"Your Music, Your Tunes"