How to Detect a Tamper Condition
If 
is pressed and the horn sounds,
an attempted break-in occurred while the system was armed.
If the alarm has been activated, a message will appear on the DIC. See Anti-theft Alarm System Messages for additional information.
See also:
OnStar®
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. See OnStar Overview&nb ...
Door Ajar Light
This light comes on in the Driver
Information Center (DIC) when a
door is open or not securely latched.
Before driving, check that all doors
are properly closed. ...
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can
be obtained from your dealer.
...