GM Service Manual Online
For 1990-2009 cars only

Object Number: 1873041  Size: G1
  (Power Mirrors): Press to select the driver side or passenger side mirror. Press the arrows to move the selected mirror in the desired direction.

Outside Heated Mirrors

The vehicle may have outside heated mirrors which help clear the condensation, snow, and ice.

(Rear Window Defogger): Press to heat the mirrors. See "Rear Window Defogger" under, Climate Control System for more information.