The light sensor for the headlights lights up when I lock the doors


Asked by Nov 04, 2011 at 09:02 AM about the 2011 GMC Terrain

Question type: Maintenance & Repair

When I get out of my 2011 GMC Terrain & lock the doors, the light sensor in the center of the dash turns red for about 10 secs then starts flashing,  This continues until I unlock the car.

2 Answers

Richard Schroer

when it turns red it is arming the security system- when it is blinking, it is warning potential thieves that the alarm is active- it shuts off because when you unlock the car, you are disarming the security system.

15 out of 15 people think this is helpful.

The point we are all Making is the red light never use to be on. So how do we dis arm or turn it off. Go to a use car lot, none of the red lights are flashing

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