THEFTLOCK® is designed to discourage theft of the vehicle's radio by learning a portion of the Vehicle Identification Number (VIN). The radio does not operate if it is stolen or moved to a different vehicle.
Chevrolet Cobalt Service & Repair Manual. Radio, Replace
1.
Remove accessory trim panel and disconnect
electrical connectors.
2.
Remove mounting screws and pull radio
out.
3.
Disconnect radio electrical connectors
and remove radio.
...