2008 GMC Sierra 1500 Pickup Owner's Manual - Page 154

The fog lamps are cancelled after the ignition is turned off. If you still want to use the fog lamps after the vehicle is restarted, press the fog lamp button again. Some localities have laws that require the headlamps to be on along with the fog lamps. Dome Lamp Override The dome lamp override button is located next to the exterior lamps control. Instrument Panel Brightness D (Instrument Panel Brightness): This feature controls the brightness of the instrument panel lights and is located next to the exterior lamp control. Push the knob to extend out and then it can be turned. Turn the knob clockwise or counterclockwise to brighten or dim the instrument panel lights. Turning the knob to the farthest clockwise position turns on the dome lamps. k (Dome Off): Press the button in and the dome lamps remain off when a door is opened. Press the button again to return it to the extended position so that the dome lamps come on when a door is opened. Entry Lighting Your vehicle has an illuminated entry feature. When a door is opened, the dome lamps and puddle lamps come on if the dome override feature is not in use. If the dome override feature is used, the lamps do not come on. Dome Lamps The dome lamps come on when any door is opened. They turn off after all the doors are closed. The dome lamps can also be turned on by turning the instrument panel brightness knob, located next to the exterior lamps control, clockwise to the farthest position. In this position, the dome lamps remain on whether a door is opened or closed. Exit Lighting The interior lamps come on when the key is removed from the ignition. They turn off automatically in 20 seconds. The lights do not come on if the dome override button is pressed in. 3-18