2003 GMC Sierra 1500 Pickup Owner's Manual - Page 168

Exterior Lamps (Parking Lamps): Turning the control to this position turns on the parking lamps, together with the following: 0 too: Sidemarker Lamps Taillamps License Plate Lamps * 0 Instrument Panel Lights Roof Marker Lamps (If Equipped) 0 I he switch on the driver's side of your instrument panel a (Headlamps): Turning the switch 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/high-beam lever towards the instrument panel. A circuit breaker protects your headlamps. If you have an electrical overload, your headlamps will flicker on and off. Have your headlamp wiring checked right away if this happens. operates the exterior lamps. Turn the control clockwise to operate the lamps. The exterior lamp switch has four positions: 0(OFF): Turning the switch to this position turns off the Daytime Running Lamps (DRL) andthe automatic headlamps. An indicator light will illuminate when the position is selected. 3-13