LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2004 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 450 (Entertainment System) >> Description and Operation >> Radio/Audio System Operation-Theftlock >> To Add Owner's Code
April 5, 2026: LEMON Manuals is launched! Read the announcement.

To Add Owner's Code

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

(To set the User Code (Activate) From the Unlocked Mode, Deterrent Deactivated):

Important:  If SEC displays, the theft-deterrent is already activated. This means the old code must be removed before entering a new code.

  1. Turn the radio OFF. Press and hold push button numbers 1 and 4 for about 6 seconds until the display changes to "- - -".
  2. Press HR to set the first two digits (0-19) of the code.
  3. Press MN to set the next two digits (0-99) of the code.

    Important:  If"- - -" displays after pressing AM/FM, the owners code has not been entered.

  4. Press the AM/FM button to enter the code.
  5. When REP then 000 are displayed, repeat steps  2 through  4 . This confirms the owners code and activates the theft-deterrent. SEC appears on the display indicating that the theft-deterrent is active, then the time of day appears on the display.

Anytime battery power is cycled and ignition is applied the LOC appears on the display. The system locks. To unlock the system use the owners code or the factory backup code. Refer to Radio Theft-Deterrent Unlocking After Power Loss.

scientia non olet · About LEMON Manuals