GM Service Manual Online
For 1990-2009 cars only

If the vehicle has this mirror, it has a lever located at the bottom that is used to change the mirror from the day to the night position. To reduce glare from headlalmps behind you while driving at night, pull the lever toward you. Push the lever to return the mirror to the day position.

There are two map lamps located on the bottom of the mirror. Press the button next to each lamp to turn it on and off.