Lock All Doors

Press the LOCK button in order to perform the following functions:
^ Lock all of the doors.
^ Immediately turn off the interior lamps.
^ Arm the Content Theft Deterrent (CTD) system (if equipped).

Press the LOCK button again within 5 seconds of the first press in order to perform the following functions:
^ Flash the exterior lights (if enabled).
^ Chirp the horn twice (if enabled).