2008 Chevrolet Uplander Owner's Manual - Page 177

Instrument Panel Brightness The knob to adjust the instrument panel brightness is located in the center of the interior lamp controls. Interior Lamps Control The interior lamp control is located to the right of the exterior lamp controls on the instrument panel to the left of the steering column. Turn the knob clockwise to brighten the lights and counterclockwise to dim them. R (Interior Lamp Override): Turn the outer knob to this position to have your interior lamps remain off while any door is open. 1 (Door): Turn the outer knob to this position to turn the interior lamps on while any door is open and when the ignition key is removed from the ignition. + (Interior Lamps): Turn the outer knob to this position to turn the interior lamps on. Turn the inner knob to adjust the instrument panel brightness, described earlier in this section. 3-17