2007 GMC Sierra 1500 Pickup Owner's Manual - Page 222

The headlamp control has four positions: 9 (Off): Turn the control to this position to turn off the Daytime Running Lamps (DRL) and the automatic headlamps. AUTO (Automatic): Turn the control to this position to activate the automatic headlamp mode. Switch the headlamps from high to low-beam by pushing the turn signal/high-beam lever towards the instrument panel. A circuit breaker protects the headlamps. If you have an electrical overload, the headlamps will flicker on and off. Have your headlamp wiring checked right away if this happens. ; (Parking Lamps): Turn the control to this position to turn on the parking lamps, together with the following: • Sidemarker Lamps Taillamps License Plate Lamps Instrument Panel Lights Roof Marker Lamps (If the vehicle has them) Headlamps on Reminder A reminder chime will sound when the headlamps or parking lamps are manually turned on and your ignition is off and a door is open. To disable the chime, turn the light off. Daytime Running Lamps (DRL) Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. DRL can be helpful in many different driving conditions, but they can be especially helpful in the short periods after dawn and before sunset. Fully functional DRL are required on all vehicles first sold in Canada. 5 (Headlamps): Turn the control to this position to turn on the headlamps, together with the previously listed lamps and lights. 222