Unlocking Secured Radio
THEFTLOCK TMIf the radio system is secured ("SEC" shows on the display) and you wish to disable it, enter the security code as follows, pausing no more than 15 seconds between steps:
1. Turn ignition on. Make sure radio system is off. The time will show on the display.
2. Press push buttons "1" and "4" together until "SEC" shows on the display.
3. Press "MIN" and "000" will appear on the display.
4. Press "MIN" again and hold until the last two digits of the code appear. Release the button.
5. Press "HR" until the first one or two digits appear.
6. Press "AM/FM." If -----" shows, you have shut off the theft-deterrent feature. If "SEC" shows, the audio system is still secured.
Important: 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.