2000 GMC Yukon Owner's Manual - Page 120

Exterior Lamps Turn the knob clockwise to the master lamps symbol to turn on all the lamps listed as well as the headlamps. Turn the knob all the way counterclockwise to turn off your lamps and put the system into automatic headlamp mode. Rotate the thumbwheel next to the knob up to adjust instrument panel lights. Rotate the thumbwheel up to the first notch to return the radio and gearshift indicator LED display to full intensity when the headlamps or parking lamps are on. To turn on the dome lamps, with the vehicle doors closed, rotate the thumbwheel up to the second notch position. You can switch your headlamps from high to low-beam by pulling on the turn signal/high-beam lever. Your parking lamp and headlamp switch is on the driver's side of your instrument panel. Turn the knob clockwise to the parking lamps symbol to manually turn on: 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. D D D D D Parking Lamps Sidemarker Lamps Taillamps License Plate Lamps Instrument Panel Lights Automatic Headlamp System When it is dark enough outside, your automatic headlamp system will turn on your headlamps at the normal brightness along with other lamps such as the taillamps, sidemarker, parking lamps and the instrument panel lights. The radio lights will also be dim. 2-43