Radio/Audio System Operation - Theftlock

The THEFTLOCK system is designed in order to discourage theft of the radio. The system uses a secret code in order to disable all radio functions whenever battery power is removed. The THEFTLOCK feature for the radio may be used or ignored. If the feature is ignored, the system plays normally and is not protected by the feature. When THEFTLOCK is activated, the radio displays LOC in order to indicate a locked condition any time battery power is removed. When the battery loses power for any reason, you must unlock the radio with the secret code in order for the radio to operate.

If the security is activated and the radio is disconnected from battery power, the radio will display "LOC". The radio will not turn on until the correct unlocking code is entered. If the customer code is lost or unavailable, contact your local GM dealership or an authorized Delco radio service center for additional assistance.