GM Service Manual Online
For 1990-2009 cars only

Front Seat Adjuster Replacement Six-Way Power

Removal Procedure


    Object Number: 817977  Size: SH
  1. If one side of the seat adjuster is not working, perform the following procedure:
  2. 1.1. The horizontal drive motor (1) and drive cables (4) are located at the front of the seat. Verify that both cables are straight. If a cable is bent an end will be pulled out of the drive motor or drive screw. Straighten the cable. You may have to toggle the seat switch to get the cable ends to properly seat.
    1.2. Run the seat forward until the seat removal bolts are accessible.
    1.3. Once the seat is removed examine the cables to assure that no damage has occurred.
    1.4. The two sides of the seat adjuster will now be out of sync. Align these sides or the adjuster may be noisy and the motor may overheat and fail.

    Use the following steps to align the adjuster:

             1.4.1. Tip the seat rearward.
             1.4.2. Reconnect the adjuster to the power switch.
             1.4.3. Run the seat adjuster rearward until the drive bracket (3) and the anchor bracket (2) are together on one side of the adjuster.
             1.4.4. Disconnect the drive cable on that side and run the opposite side rearward until its brackets touch.
             1.4.5. Re-attach the cables  (4) to the motor and verify that the cables are straight between the motor (1) and the drive brackets (3).

    Object Number: 816215  Size: SH
  3. If the power seat motor is not operable, and the bolts that secure the adjuster to the floor pan are not accessible, perform the following procedure:
  4. 2.1. From the front of the seat, disconnect both drive cables at the horizontal drive motor (2), which is located at the front of the seat adjuster.
    2.2. Attach a drill motor to a drive cable (1).
    2.3. Alternately run both sides of the adjuster forward until the seat removal bolts are accessible.
  5. Remove the front seat. Refer to Front Seat Replacement - Bucket .
  6. Remove the seat trim panel. Refer to Front Seat Adjuster Track Finish Cover Replacement .

  7. Object Number: 802619  Size: SH
  8. Remove the seat belt bracket (2) on the door side of the seat. The new seat adjuster does not have this part.
  9. Remove the seat belt pretensioner. Refer to Seat Belt Buckle Pretensioner Replacement in SIR.

  10. Object Number: 800742  Size: SH
  11. If equipped, remove the electrical harness from the power seat motor harness.

  12. Object Number: 800745  Size: SH
  13. Remove the electrical harness clip and disconnect the harness retainer from the adjuster bracket.
  14. Recline the seat back to the full reclined position.
  15. Remove the trim cover J-hooks from under the seat pan.

  16. Object Number: 865020  Size: SH
  17. Remove the seat trim and the pad to access the seat pan bolts.
  18. Remove the 4 seat pan bolts.
  19. Remove the seat pan

  20. Object Number: 864992  Size: SH
  21. Remove the 2 adjuster cover plates.

  22. Object Number: 865006  Size: SH
  23. Remove the seat back frame bolts.
  24. Remove the seat back from the adjuster.
  25. Remove the seat adjuster.

Installation Procedure


    Object Number: 864992  Size: SH
  1. Place the adjuster covers on the seat adjuster.

  2. Object Number: 865006  Size: SH
  3. Place the seat back frame on the adjuster covers.
  4. 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.

  5. Install the bolts that secure the seat back to the adjuster.
  6. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).


    Object Number: 865020  Size: SH
  7. Install the seat pan.
  8. Install the bolts that secure the seat pan to the adjuster.
  9. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).


    Object Number: 865021  Size: SH
  10. Install the seat pad and trim cover together.
  11. Install the seat cushion J-hooks and the hook and loop retainers to secure the trim to the seat pan.
  12. Press down on the cushion trim pad to secure the hook and loop retainers to the seat pad.

  13. Object Number: 800745  Size: SH
  14. Install the electrical harness clip and the retainer on the adjuster bracket.

  15. Object Number: 800742  Size: SH
  16. Connect the electrical harness to the seat motor harness.
  17. Install the seat belt pretensioner. Refer to Seat Belt Buckle Pretensioner Replacement in SIR.
  18. Install the seat belt bracket.
  19. Install the seat trim panel. Refer to Front Seat Adjuster Track Finish Cover Replacement .
  20. Important: Inspect the drive cables. Verify that the cables are straight between the motors and the drive screws.

  21. Install the front seat. Refer to Front Seat Replacement - Bucket .

Front Seat Adjuster Replacement Two-Way Manual

Removal Procedure

  1. Remove the front seat from the vehicle. Refer to Front Seat Replacement - Bucket .
  2. Remove the front seat trim panel. Refer to Front Seat Adjuster Track Finish Cover Replacement .

  3. Object Number: 802619  Size: SH

    Important: The bracket is NOT included with a seat adjuster. Reinstall the existing bracket.

  4. Remove the seat belt bracket (2) on the door side of the seat.
  5. Remove the seat belt pretensioner. Refer to Seat Belt Buckle Pretensioner Replacement .

  6. Object Number: 865020  Size: SH
  7. Remove the seat trim and the pad. Refer to Front Seat Cushion Replacement .
  8. Remove the 4 seat frame bolts.
  9. Remove the seat frame.

  10. Object Number: 864992  Size: SH
  11. Remove the 2 adjuster cover plates.

  12. Object Number: 865006  Size: SH
  13. Remove the seat back frame bolts.
  14. Remove the seat back from the adjuster.

  15. Object Number: 310454  Size: SH
  16. Remove the adjuster from the seat cushion frame.
  17. Remove the adjuster crosswire and assist springs.
  18. Remove the crossbrace bolts in order to separate the left and the right adjusters.

Installation Procedure


    Object Number: 310454  Size: SH
  1. Install a crossbrace to the left and the right adjusters.
  2. Ensure that the tab bending downward at the center of the crossbrace faces the rear of the adjusters.
  3. 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.

  4. Secure the crossbrace with two bolts.
  5. Tighten
    Tighten the crossbrace bolts to 6 N·m (53 lb in).

  6. Install the crosswire and assist springs.
  7. Important: Install the right and left seat adjuster sliding mechanism in the same position that the mechanism had when you attached the adjuster-to-seat bottom frame.

    Install the adjuster assembly to the floorpan attachments before you attach the adjusters to the seat. Use the floorpan as a guide during assembly in order to ensure correct adjuster alignment. The floorpan will act as an assembly fixture.

  8. Install the adjuster assembly to the floorpan.
  9. Install the bolts which secure the seat adjuster to the floorpan.
  10. Tighten
    Tighten the bolts to 42 N·m (31 lb ft).


    Object Number: 864992  Size: SH
  11. Install the 2 adjuster cover plates.

  12. Object Number: 865020  Size: SH
  13. Position the seat frame on the adjuster.
  14. Install the 4 bolts which secure the seat frame to the adjuster.
  15. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).

  16. Install the seat cushion cover and pad. Refer to Front Seat Cushion Replacement .

  17. Object Number: 802619  Size: SH
  18. Install the seat belt bracket (2).
  19. Install the seat belt pretensioner. Refer to Seat Belt Buckle Pretensioner Replacement .
  20. Install the front seat trim panel. Refer to Front Seat Adjuster Track Finish Cover Replacement .
  21. Install the front seat in the vehicle. Refer to Front Seat Replacement - Bucket .