GM Service Manual Online
For 1990-2009 cars only

Power (AU3) door lock shown, manual (without AU3) door lock similar.

Removal Procedure

  1. Remove the rear door trim panel. Refer to Rear Side Door Trim Panel Replacement .
  2. Remove the rear door speaker. Refer to Radio Rear Side Door Speaker Replacement in Entertainment.
  3. Remove the rear inside door handle. Refer to Rear Side Door Inside Handle Replacement .
  4. Remove the rear door water deflector. Refer to Rear Side Door Water Deflector Replacement .
  5. Remove the rear door window run channel. Refer to Rear Side Door Window Channel Replacement .

  6. Object Number: 1256431  Size: SH
  7. Disconnect the lock cable retainer (1) and remove the lock cables (2) from the retainer.
  8. Disconnect the outside door handle rod by releasing the retaining clip on the outside door handle.
  9. Remove the bolt (1) retaining the door lock assembly to the inner panel, if equipped with AU3.
  10. Remove the screws retaining the door lock assembly to the door.

  11. Object Number: 1311900  Size: SH
  12. Disconnect the electrical connector from the rear door lock assembly, if equipped with AU3.
  13. Remove the door lock assembly from the door.

Installation Procedure


    Object Number: 1311900  Size: SH
  1. Install the rear door lock assembly to the rear door.
  2. Connect the electrical connector to the rear door lock assembly, if equipped with AU3.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the screws retaining the rear door lock assembly to the door.
  5. Tighten
    Tighten the rear door lock screws to 7 N·m (62 lb in).

  6. Install the bolt (1) retaining the door lock assembly to the inner panel, if equipped with AU3.
  7. Tighten
    Tighten the rear door lock bolt to 9 N·m (80 lb in).

  8. Connect the outside door handle rod to the door handle using the retaining clip on the rear outside door handle.

  9. Object Number: 1256431  Size: SH
  10. Install the lock cables (2) into the lock cable retainer (1) and connect the retainer.
  11. Install the rear door window run channel. Refer to Rear Side Door Window Channel Replacement .
  12. Install the rear inside door handle. Refer to Rear Side Door Inside Handle Replacement .
  13. Install the rear door water deflector. Refer to Rear Side Door Water Deflector Replacement .
  14. Install the rear door speaker. Refer to Radio Rear Side Door Speaker Replacement in Entertainment.
  15. Install the rear door trim panel. Refer to Rear Side Door Trim Panel Replacement .