Disabling the Theftlock™ Feature

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 3.

In order to disable the Theftlock™ feature, enter the user code as follows:

Turn the ignition to ACCESSORY or RUN.
Turn the radio OFF.
Press the 1 and 4 buttons together. Hold then down until SEC appears on the display.
Press MN for Yukon, Denali / SEEK right button for Escalade and "000" will appear on the display.
Press and hold MN for Yukon, Denali / SEEK right button for Escalade until the last two digits agree with the user code.
Press and hold HR for Yukon, Denali / SEEK left button for Escalade until the first one or two digits agree with the user code.
Press the AM/FM push button after you have confirmed that the code matches the one you wrote down. If REP appears on the display, repeat steps 4 through 7.
The display will show "- - -", indicating that the radio is no longer secured.
If the code is entered incorrectly, SEC appears on the display.
The radio will remain secured until the correct code is entered.