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#04-06-04-047L: TOP TIER Detergent Gasoline (Deposits, Fuel Economy, No Start, Power, Performance, Stall Concerns) – U.S. Only - (Nov 7, 2013)
Subject:TOP TIER Detergent Gasoline (Deposits, Fuel Economy, No Start, Power, Performance,Stall Concerns) – U.S. OnlyModels: 2014 and Prior GM Cars and Trucks (U.S. Only) This bulletin has been revised to add the 2014 model year. Please discard CorporateBulletin Number 04-06-04-047K. In Canada ...