Removal Procedure

Remove the front door trim panel. Refer to TRIM PANEL REPLACEMENT - SIDE FRONT DOOR .
Disconnect the power mirror electrical connector.
Remove the front door inner panel mirror insulators (3).
Remove the outside rearview mirror nuts (2).
Remove the outside rearview mirror (1) from the front door.

Fig 1: Removing Outside Rearview Mirror, Nuts & Insulators From Front Door
Courtesy of GENERAL MOTORS CORP.