1999 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 123

yellowblue Exterior Lamps Turn the knob clockwise to the parking lamps symbol to manually turn on: D D D D D Parking Lamps Sidemarker Lamps Taillamps License Plate Lamps Instrument Panel Lights 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 in auto headlamp mode. Automatic Headlamp System Your parking lamp and headlamp switch is on the driver's side of your instrument panel. 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. Your vehicle is equipped with a light sensor on the top of the instrument panel in the defroster grille. Be sure it is not covered, or the system will be on whenever the ignition is on. 2-51