Headlamps for GMC Truck GMC Sierra Denali 2005

The control on the driver's side of the instrument panel operates the exterior lamps.

Turn the control clockwise to operate the lamps.

The exterior lamp control has four positions:

(OFF): Turning the control to this position turns off the Daytime Running Lamps (DRL), and the automatic headlamps.

AUTO (Automatic): Turning the control to this position puts the system into automatic headlamp mode.

(Parking Lamps): Turning the control to this position turns on the parking lamps, together with the following:

(Headlamps): Turning the control to this position turns on the headlamps, together with the previously listed lamps and lights. You can switch your headlamps from high to low-beam by pushing the turn signal/multifunction lever towards the instrument panel.