Lock All Doors

WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. 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 daytime running lamps, if selected ON in personalization.
Chirp the horn, if selected ON in personalization.
Arm the content theft deterrent (CTD) system after all of the doors are closed.