GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Century (China) (CNG) 🢒 Body and Accessories 🢒 Doors 🢒 Rear Side Door Window Regulator Replacement

Removal Procedure
  1. Remove the trim panel. Refer to Rear Side Door Trim Panel Replacement .
  2. Remove the water deflector. Refer to Rear Side Door Water Deflector Replacement .

    3. Object Number: 388500 Size: SH
  3. Remove the two window to regulator bolts by raising the window far enough to gain access to the bolts through the door metal.
  4. Raise and tape the window in the full up position.
  5. Remove the three regulator motor mounting bolts.
  6. Remove the four regulator rail mounting bolts.
  7. Remove the armrest bracket.
  8. Remove the regulator from the door.
  9. Remove the electrical connector.

Installation Procedure

    Object Number: 388500 Size: SH
  1. Position the regulator by the door.
  2. Install the electrical connector.
  3. Thread the three bolts onto the regulator motor.
  4. Thread the top two bolts onto the regulator rail and also the bottom front bolt.
  5. Place the regulator rail assembly into the door through the access hole.
  6. Place the regulator motor into the door through the access hole.
  7. Hang the regulator motor into the key slots in the inner panel.
  8. Hang the regulator rail assembly into the key slots in the inner panel.
  9. Install the fourth screw into the rail assembly.

    10. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  10. Install the three regulator to motor bolts.

    11. Tighten
    Tighten the window to regulator motor bolts to 10 N·m (89 lb in).

  11. Install the four regulator rail bolts.

    12. Tighten
    Tighten the four window regulator bolts to 10 N·m (89 lb in).

  12. Remove the tape and the lower the window.
  13. Install the window to regulator bolts by lowering window far enough to gain access to the bolts through the door metal.

    14. Tighten
    Tighten the two window to regulator bolts to 10 N·m (89 lb in).

  14. Install the armrest bracket.
  15. Install the water deflector. Refer to Rear Side Door Water Deflector Replacement .
  16. Install the trim panel. Refer to Rear Side Door Trim Panel Replacement .