2005 Buick LaCrosse Owner's Manual - Page 130

Interior Lamps Your interior lamps control is located next to the exterior lamps control and to the left of the steering wheel on the instrument panel. Instrument Panel Brightness The instrument panel lights can be brightened or dimmed by pressing the center knob of the interior lamp controls until it pops out. Turn the knob clockwise to brighten the lights or counterclockwise to dim them. Courtesy Lamps Courtesy lamps come on to make it easier to enter and exit the vehicle. These lamps will come on when the interior lamp control is in the door position and any door is opened. Turn the control to this position to disable courtesy lamps, entry lighting, delayed entry lighting, and delayed exit lighting. 9 (Off): Entry Lighting The courtesy lamps will come on and stay on for a set time whenever the interior lamp control is in the door position and the UNLOCK button on the remote keyless entry transmitter is pressed. The lamps will stay on while a door is opened and then turn off automatically about 25 seconds after it is closed. If the UNLOCK button is pressed and a door is not opened, the lamps will turn off after about 25 seconds. 1 (Door): Turn the control to this position to turn the interior lamps on when any door is open and when the ignition key is removed from the ignition. + (On): Turn the control to this position to turn the interior lamps on. The interior lamps can be controlled, or automatically turned on or off under certain conditions. They are explained in the following text. 3-16