2005 Buick Century Owner's Manual - Page 72

Programming the LOCK Command One of four modes can be selected to confirm a LOCK command. Mode 1 (One Chime): No Verification Mode 2 (Two Chimes): Horn Chirp Mode 3 (Three Chimes): Headlamps Flash Mode 4 (Four Chimes): Horn Chirp and Headlamps Flash The vehicle was originally programmed to Mode 3. The mode may have been changed since then. To determine the current lock mode, or to change the lock mode, do the following: 1. Close all doors and turn the ignition key to RUN. 2. Press and hold the power door lock switch in the LOCK position. 3. While holding the power door lock switch in the LOCK position, press and release the remote keyless entry transmitter LOCK button. A series of one to four chimes will sound, corresponding to the current lock mode. 4. Press the remote keyless entry transmitter LOCK button to advance to the next lock mode. If cycled beyond Mode 4, the vehicle will enter Mode 1. 5. To set a mode, release the power door LOCK switch after the chime sequence of the desired mode is heard. Programming the UNLOCK Command One of four modes can be selected to confirm an UNLOCK command. Mode 1 (One Chime): No Verification Mode 2 (Two Chimes): Horn Chirp Mode 3 (Three Chimes): Headlamps Flash Mode 4 (Four Chimes): Horn Chirp and Headlamps Flash 2-6