2005 GMC Yukon Owner's Manual - Page 164

Erasing Speed Memory When you turn off the cruise control or the ignition, your cruise control set speed memory is erased. The headlamp control has four positions: 9 (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. Headlamps ; (Parking Lamps): Turning the control to this position turns on the parking lamps, together with the following: Sidemarker Lamps Taillamps License Plate Lamps Instrument Panel Lights Roof Marker Lamps (If Equipped) 5 (Headlamps): The control on the driver's side of your instrument panel operates the headlamps. Turn the control clockwise to operate the lamps. 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/high-beam lever towards the instrument panel. 3-14