Lock All Doors

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Press the LOCK button in order to perform the following functions:

Lock all of the doors.
Immediately turn off the interior lamps.
Flash the headlamps, if selected ON in personalization
Chirp the horn, if selected ON in personalization.
Arm the content theft deterrent (CTD) system.