GM Service Manual Online
For 1990-2009 cars only

If you have a sunroof, you will have a reading lamp near the sunroof switch. Press the button to turn the lamp on and press it again to turn it off.

If you do not have a sunroof, your vehicle's inside rearview mirror may be equipped with reading lamps. If your vehicle is equipped with reading lamps, there are two buttons located on the bottom of the mirror. Press the buttons to turn the lamps on and press them again to turn the lamps off.

To prevent the battery from draining on vehicles with power door locks, the lamps will automatically turn off when the key is in the ACC or LOCK positions or if the key is removed for 20 minutes or more. The lights will come on when any of the doors are opened or if the key is turned to the ON position.