2003 Buick Century Owner's Manual - Page 170

Theft-Deterrent Feature THEFTLOCK@is designed to discourage theft of your radio. It works by using a secret code to disable allradiofunctionswhenever battery power is interrupted. If THEFTLOCK@ is active, the TH€FTLOCK@ indicator will flash when the ignition is off. The TH€FTLOCK@ feature for the radio may be used or ignored. If ignored, the system plays normally and the radio is not protected by the feature. If THEFTLOCK@ is activated, your radio will not operate if stolen. V/hen THEFTLOCK@ is activateu, the radio wiii uispiay LOC to indicate a locked condition anytime battery power is removed.Ifyour battery loses power for any reason, you must unlock the radio with the secret code before it will operate. If you allow more than 15 seconds to elapse between any steps, the radio automatically reverts to time and you must start the procedure over at Step 4. Activating the Theft-Deterrent Feature The instructions which follow explain how to enter your secret code to activate the THEFTLOCK@ system.Readthroughall nine steps before starting the procedure. 1. Write down any three or four-digit number from 000 to 1999 and keep it in a safe place separate from the vehicle. 2. Turn the ignition on. 3. Turn the radio off. 4. Press the 1 and 4 pushbuttons at the same time. Hold them down until --- shows on the display. Next you will use the secret code number which you have written down. 5. Press MIN and 000 will appear on the display. 6. Press biiN again io make the last two digits agree with your code. 7 . Press HRS to make the first one or two digits agree with your code. 8. Press AM-FM after you have confirmed that the code matches the secret code you have written &\A!n. The ~ic-ils:/ y h l l ShQ\!! REP p !et :'"E knmAl J that you need to repeat Steps 5 through 7 to confirm your secret code. 9. Press AM-FM and this time the display will show SEC to let you know that your radio is secure. " 3-6 1