GM Service Manual Online
For 1990-2009 cars only

Adjust the mirrors by pressing the mirror up and down and left and right so you can see a little of the side of your vehicle, and have a clear view of objects behind you.

The mirrors can be manually folded in or out.

On the lower portion of each mirror is an auxiliary convex mirror. A convex mirror's surface is curved so you can see more from the driver seat. The auxiliary convex mirrors can be adjusted manually by pressing the mirror.