hello and welcome. is this the orginal battery that came in the vehicle?
Ok, these radios are programmed with the vin number that the radio was orginally installed. so in other words, the radio you installed from salvage yard has a different vin number. what you will have to do is visit your local dealer, the dealer can reprogram the radio with your vin number, this will inlock the radio so it will work.
The theft deterrent system is a feature on all base and uplevel radios. There is no need to program a security code into the radio as in past model years. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place the radio will not respond to any button presses and become inoperative. The two scenarios able to cause this condition are:
ASE Certified Technician
Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer,