Arming the System
To arm the system, do one of the following:
○ Press 
on the RKE transmitter.
○ Lock the vehicle using the key in the driver door.
The alarm automatically arms after about 30 seconds. The security light, located on the instrument panel, flashes.
Press 
on the RKE transmitter to
open the liftgate without setting off the alarm. The system rearms when the liftgate
is closed.
See also:
OnStar Overview
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services.
The OnStar system statu ...
Global Positioning System (GPS)
○ Obstruction of the GPS can occur in a large city with tall buildings; in parking
garages; around airports; in tunnels, underpasses, or parking garages; or in an
area with very dense trees. ...
Erasing Universal Home Remote Buttons
The programmed buttons should be erased when the vehicle is sold or the lease ends.
To erase either Rolling Code or Fixed Code settings on the Universal Home Remote device:
1. Press and hold the two ...