2000 GMC Sierra 1500 Pickup Owner's Manual - Page 130

yellowblue Fog Lamps (If Equipped) If you have fog lamps, use them for better vision in foggy or misty conditions. Your parking lamps and/or low-beam headlamps must be on for your fog lamps to work. The fog lamp switch is located on the left side of your instrument panel. The fog lamps will be cancelled after the ignition is turned off. If you still want to use the fog lamps after you restart the vehicle, you will need to press the fog lamp switch again. Auxiliary Roof Mounted Lamp Switch (If Equipped) This switch includes wiring provisions for a dealer or a qualified service center to install an auxiliary roof lamp. This switch is located on the center of the instrument panel near the comfort controls. Press the switch to turn the fog lamps on. Press the switch again to turn them off. An indicator light will glow in the switch when the fog lamps are on. Remember, fog lamps alone will not give off as much light as your headlamps. Never use your fog lamps in the dark without turning on your headlamps. The fog lamps will go off whenever your high-beam headlamps come on. When the high beams go off, the fog lamps will come on again. When the switch wiring is connected to an auxiliary roof mounted lamp, pressing the button will activate the lamp and illuminate an indicator light near the button. Pressing the button again will turn off the roof mounted lamp. If your vehicle has this switch, your vehicle may have the Snow Plow Prep Package. For further information see "Snow Plow Prep Package" in the Index. 2-52