Lock All Doors

WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. 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 park lamps if the ignition is OFF and the doors are closed.
Chirp the horn if the ignition is OFF and the doors are closed.