Lock All Doors - Active

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Press the transmitter LOCK button to perform the following functions:

Lock all vehicle doors. Immediately turn off the interior lamps.
Lock the liftgate.
Flash the exterior lights, if enabled through the driver information center (DIC).
Chirp the horn if the LOCK button is pressed again within 5 seconds, if enabled through the DIC.
Arm the Content Theft Deterrent (CTD) System, if equipped.