2003 Buick LeSabre Owner's Manual - Page 203

Theft-Deterrent Feature THEFTLOCK@is designed to discourage theft of your radio. It works by using a secret code to disable all radio functions whenever battery power is removed and the radio is placed in a different vehicle. This feature requires no user input to be activated. It is automatically armed when it is put into the vehicle for the first time. When the ignition is turned off, the blinking red light indicates that THEFTLOCK@is armed. If THEFTLOCK@is activated, your radio will not operate if stolen. The radio will display LOCKED and a red LED indicator light will come on above the key symbol to indicate a locked condition. If this occurs, the radio will need to be returned to the dealer. Audio Steering Wheel Controls If your vehicle has this feature, you can control certain radio functions using the buttons on your steering wheel. SOURCE: Press this button to play a cassette tape or compact disc when listening to the radio. If a cassette tape and a compact discare both loaded, the systemwill go to the tape play first. MUTE: Press this button to silence the system. Press it again to turn on the sound.