1997 GMC Jimmy Owner's Manual - Page 162

Disabling the Theft-Deterrent Feature Enter your secret code a s follows; pause no more than I5 seconds between steps: 1 . Turn the ignition to ACCESSORY o r R U N . 2. Turn the radio off. Understanding Radio Reception FWl Stereo 5 . Press M N again to nlake the last two digits agree with your cock. 6. Press HR to make the first one or two digits agree with your code. 7 . Press AM-FM after you have confiI-med that the code matches the secret code you have written do~+m. The display will show ---, indicating that the radio is no longer secured. If the code entered is incorrect, SEC will appear OII the display. The radio will remain s e c ~ ~ r e n t i l the correct ud code is entered. 3-19