This vehicle has an anti-theft alarm system.

The indicator light, on the instrument panel near the windshield, indicates the status of the system: Off : Alarm system is disarmed.
On Solid : Vehicle is secured during the delay to arm the system.
Fast Flash : Vehicle is unsecured.
A door, the hood, or the liftgate is open.
Slow Flash : Alarm system is armed.
Vehicle Security
Arming the Alarm System#06-08-44-012G: DVD Navigation Update Program, Navigation Disc Diagnostic Aid, AVN Software Update Discs and Ordering Information - (Sep 24, 2013)
Subject:DVD Navigation Update Program, Navigation Disc Diagnostic Aid, AVN Software UpdateDiscs and Ordering InformationModels: 2002-2014 GM Cars and TrucksAttention: Please direct this information to your Sales Consultants, Service Consultants, PartsPersonnel and Used Car Department. This bulleti ...