Removal Procedure

Remove the front door window defogger duct. Refer to Defogger Outlet Duct Replacement - Side Window, LH or Defogger Outlet Duct Replacement - Side Window, RH in Heating, Ventilation and Air Conditioning.
Remove the inner panel outside rearview mirror insulator (3).
Remove the 3 screws (2) securing the mirror (1) to the door.
Disconnect the electrical connector (4) from the outside rearview mirror (1).
Remove the outside rearview mirror (1) from the front door.

Fig 1: View Of Rearview Mirror, Insulator, Electrical Connector & Screws

Courtesy of GENERAL MOTORS CORP.