1997 GMC Suburban Owner's Manual - Page 114

Erasing Speed Memory When you turn offthe cruise control or the ignition, your cruise control set speed memory is erased. Sidemarker Lamps, Clearance Lamps (if you have them), Taillamps, License Plate Lamps and Instrument Panel Lights. Rotate the knob clockwise again to the master lighting symbol to turn on all the lamps listed as well as the headlamps. Rotate the knob counterclockwise toOFF to turn off your lamps. Rotate the thumb wheel next to the knob up to adjust instrument panel lights. Rotate the thumb wheel up to the first notch to return the radio display 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 thumb wheel up to the second notch position. Lamps Your parking/headlamp knob is on the driver's side of your instrument panel. Rotate the knob clockwise to the parking lamp symbol to turn on the following: Parking Lamps, You can switch your headlamps from high to low beam by pulling on the turn signalhigh beam lever. 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. 2-40