Removal Procedure

Remove the trim panel. Refer to Trim Panel Replacement - Side Front Door (Pontiac) or Trim Panel Replacement - Side Front Door (Chevrolet) .
Remove the water deflector. Refer to Water Deflector Replacement - Front Door .
Remove the inside door handle. Refer to Door Handle Replacement - Inside .
Remove the clip securing the inside handle rods to the door.
Use side cutters in order to cut off the outside handle rod-to-lock clip from the lock.

Fig 1: Removing Outside Door Handle Rod - Front Door
Courtesy of GENERAL MOTORS CORP.
Unscrew the remainder of the clip from the outside handle rod.
Discard the clip.
Remove the screws (1, 2, 3) securing the lock to the door.

Fig 2: Identifying Door Lock Components
Courtesy of GENERAL MOTORS CORP.
Disconnect the electrical connectors.

Fig 3: Disconnecting Front Door Lock Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Remove the inside handle rod, and lock rod from the lock.