Removal Procedure

Use a flat-bladed tool in order to remove the wire cover (if equipped).
Disconnect the electrical connector (if equipped).

Fig 1: Disconnecting Rearview Mirror Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Insert a small, flat-bladed tool into the slot from the bottom.
Press slightly in order to release the tab.
Slide the mirror off of the support.

Fig 2: Removing Rearview Mirror From Support
Courtesy of GENERAL MOTORS CORP.