Removal Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the inside rearview mirror electrical connector.
Loosen the mirror mount tension screw.
Slide the mirror up off the mirror bracket.

Fig 1: Disconnecting Inside Rearview Mirror Electrical Connector
Courtesy of GENERAL MOTORS CORP.