Unlocking Secured Radio After A Power Loss

In order to unlock the THEFTLOCK system after a power loss, enter the user code as follows (do not wait more than 15 seconds between steps):
^ Press MIN.
000 will appear on the display.
^ Press the MIN push button again in order to make the last two digits agree with your code.
^ Press the HR push button in order to make the first one or two digits agree with your code.
^ Press the AM/FM push button after you have confirmed that the code matches the one you wrote down.
SEC will appear in the display indicating that the radio is now operable.

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.