1999 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 127

yellowblue Front Reading Lamps (If Equipped) If your vehicle has reading lamps, press the button next to the lamp to turn the lamp on. The lamps can be adjusted to point in the direction you want. position, the dome lamps will remain off when the doors are open. To return the lamps to automatic operation, press the button again and return it to the "out" position. With the button in this position, the dome lamps will come on when you open a door. Cargo Lamp Press the button to turn the cargo lamp on. Press the button again to turn it off. Press the button again to turn the lamp off. Dome Lamps The dome lamps will come on when you open the doors. You can also turn the dome lamps on by rotating the thumbwheel, located next to the parking/headlamps knob, all the way up. In this position, the dome lamps will remain on whether the doors are opened or closed. You can use the DOME OVERRIDE button, located below the parking/headlamp knob, to set the dome lamps to come on automatically when the doors are opened, or remain off. To turn the lamps off, press the button into the "in" position. With the button in this A message in the instrument cluster will come on and display CARGO LAMP ON when the cargo lamp is turned on and the ignition key is turned to RUN. 2-55