2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 23

Interior Lighting 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 on the instrument panel to the left of the steering column, clockwise to the farthest position. In this position, the dome lamps remain on whether a door is opened or closed. The dome lamp override button is located next to the exterior lamps control. 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. Reading Lamps For vehicles with reading lamps in the overhead console, press the button located next to the lamp to turn it on or off. The vehicle may also have reading lamps in other locations. The lamps cannot be adjusted. For more information about interior lamps, see: ... Dome Lamps on page 4‑15. Reading Lamps on page 4‑16. Instrument Panel Brightness on page 4‑15. k: Exterior Lighting The exterior lamps control is located on the instrument panel to the left of the steering wheel. 1-17