Trying to figure out if the stereo is shot. Had a leak in my windshield and when I turn the truck on the speakers buzz. Also the calibration comes in the stereo. Any suggestions to trouble shot.

 

"Calibration" means that your BCM cannot identify the radio as having been programmed to the vehicle vin#. It is s GM security feature to reduce radio theft, every GM radio has to be programmed to the vehicle vin# by a Tech II programmer. I would guess your radio head unit has an issue that has cause that connection to fail. That's my story and I'm sticking to it.

 

could be the other story too Doc. wet BCM..........

 

True...........