GM Service Manual Online
For 1990-2009 cars only

The vehicle may have reading lamps on the overhead console. These lamps come on when the doors are opened if the lamp switch is not in the OFF position. Press the side of each lamp to turn them on and off, while the doors are closed.

Overhead Ambient Lighting

These lamps will automatically turn on and off as controlled by the light sensor located on top of the instrument panel.