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#10-08-46-001A: Radio Does Not Mute Enough When OnStar Turn-By-Turn Navigation Directions Are Announced (Increase Volume Setting or Request Soft Mute...
Subject:Radio Does Not Mute Enough When OnStar® Turn-by Turn Navigation Directions Are Announced(Increase Volume Setting or Request Soft Mute Feature Change Through OnStar® CustomerService)Models: 2009-2014 GM Cars and TrucksAll Equipped with OnStar® (RPO UE1)This bulletin has been revised to ad ...