Obtaining Radio Display Code (Scrambled Backup Code)
Important
The radio should be in the LOC mode or have SEC displayed before proceeding, in order to display this code.
Simultaneously press and hold the 2 and 3 pushbuttons for about 6 seconds until the first 3 digits of the display code appear.
Write the numbers down.
Press the AM-FM button. The second 3 digits will display.
Write the numbers down.
The display returns to LOC after approximately 5 seconds, or if another button is pressed. The display code must be unscrambled in order to get the factory backup code that unlocks the radio.
ONCE YOU GET THIS CODE CALL YOU NEAREST GM DEALERSHIP AND TELL THEM YOU HAVE THE SCRAMBLED BACKUP RADIO CODE AND NEED THE MASTER CODE. THEY SHOULD BE ABLE TO GET IT FOR YOU IN JUST A FEW MINUTES. THEN.....
Perform the following procedure in order to unlock the theft deterrent after a power loss:
Important
Enter the secret code as follows. Pause no more than 15 seconds between the steps.
LOC appears when the ignition is in the ON position.
Press MN/MIN and 000 will appear on the display.
Press MN/MIN again in order to make the last 2 digits agree with the code.
Press HR in order to make the first 1 or 2 digits agree with the code.
Press AM-FM after you have confirmed that the code matches the secret code you have written down. The display will show SEC, indicating that the radio is now operable and secure.
If you enter the wrong code 8 times, INOP will appear on the display. You will have to wait 1 hour with the ignition in the ON position before you may try again. You will only have 3 chances to enter the correct code before INOP appears