See also:

Headlamp Wiring
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off. ...

How the System Works
The LDW camera sensor is on the windshield ahead of the rearview mirror. To turn LDW on and off, press the LANE DEPART control on the steering wheel. The control indicator will light when LDW is ...

New for 2011
The Sierra Hybrid gets GM's OnStar 9.0 telematics system that GM says provides better voice recognition. GM also said they have worked to cut down on the amount of wind noise occupants hear. ...