WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Automatic Transmission Shift Lock Actuator Screws
Courtesy of GENERAL MOTORS CORP.
Remove the actuator screws (3).
Remove the actuator assembly (2) from the shift assembly (1).