Vin Relearn
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
If exchanging the same radio, from one vehicle to another, the VIN from the vehicle receiving the radio needs to be programmed with the scan tool. Use the program VIN procedure available in Special Functions menu of the scan tool. After programming the VIN cycle the ignition key with the retained accessory power (RAP) disabled.
IMPORTANT:
The radio setup files will configure the radio and amplifier if equipped. Without the following setup procedure, the sound quality and volume of the radio may be degraded.