GM Service Manual Online
For 1990-2009 cars only

If you have this feature, the outside driver's mirror will adjust for the glare of headlamps behind you. This feature is controlled using the on and off settings on the automatic dimming rearview mirror. See Automatic Dimming Rearview Mirror .

When you operate the rear window defogger, the heated driver's and passenger's outside rearview mirrors are warmed to help clear them of ice and snow. See "Rear Window Defogger" under Climate Control System or Dual Automatic Climate Control System for more information.