Removal Procedure

Remove the door trim panel. Refer to Trim Panel Replacement - Side Rear Door or Trim Panel Replacement - Side Front Door .
Disconnect the electrical connector from the lock switch.
Use a flat bladed tool to disengage the locking tabs (1) from both sides of the switch.
Remove the lock switch.

Fig 1: Disengaging Locking Tabs
Courtesy of GENERAL MOTORS CORP.