GM Service Manual Online
For 1990-2009 cars only

The front reading lamps, located on the headliner, will come on as courtesy lamps when you open any of the doors while it is dark outside. They will also come on as part of the interior lighting features listed previously.

To turn on a reading lamp when the doors are closed, press either button. Press it again to turn the lamp off.

To avoid draining your vehicle's battery, be sure to turn off the reading lamps when leaving your vehicle. See "Inadvertent Power Battery Saver" later in this section for more information.