GM Service Manual Online
For 1990-2009 cars only

Front Seat Adjuster Replacement 4-Way

Removal Procedure

  1. Remove the front seat. Refer to Front Seat Replacement - Bucket .
  2. Adjust the seat cushion to the highest position.
  3. Remove the seat cushion side trim. Refer to Front Seat Cushion Outer Trim Panel Replacement

  4. Object Number: 980751  Size: SH
  5. Remove the seat belt wire harness clip from the adjuster.
  6. On vehicles with heated seats, disconnect the electrical connector from the seat heater module.
  7. If the seat is equipped with a lumbar support, perform the following procedure:
  8. 6.1. Adjust the lumbar knob until the lumbar is in the setting of the least support.
    6.2. Pull the lumbar cable sleeve back.
    6.3. Remove the barrel cable end from the lumbar actuator.

    Object Number: 981202  Size: SH
  9. Remove the bolt from the seat belt buckle. Remove the buckle.
  10. Remove the lower J-hook retainer from the seat back trim cover.

  11. Object Number: 873771  Size: SH
  12. Lift the trim cover enough to expose the springs on the seat back frame.
  13. Caution: The seat back frame springs are under tension. To avoid personal injury, use care when removing or installing the frame.

  14. Adjust the rear seat back until the spring hook ends are adjacent to the notches in the seat back frame.
  15. Using a pair of channel lock® pliers, slide the hook end of the spring into the notches is the frame.

  16. Object Number: 876774  Size: SH
  17. Adjust the seat back forward to ensure that the springs are fully seated in the notches.

  18. Object Number: 875183  Size: SH
  19. Remove the bolt and the spring from the recliner handle.
  20. Remove the recliner handle.

  21. Object Number: 875184  Size: SH
  22. Remove the nuts from the outboard seat back frame.
  23. If equipped, remove the teardrop washer and bolt.
  24. Remove the nuts from the inboard seat back frame.
  25. Important: To provide more clearance when removing the seat back frame you may loosen, but do NOT remove, the bolts from the rear seat cushion frame.

  26. Remove the seat back frame, the pad, and the cover assembly from the seat.

  27. Object Number: 981684  Size: SH
  28. Remove the seat adjuster handle by squeezing both sides of the handle toward the center of the seat.
  29. Remove the seat cushion frame bolts.
  30. Remove the seat cushion assembly from between the adjusters.

  31. Object Number: 986818  Size: SH
  32. Remove the seat riser bar.

Installation Procedure


    Object Number: 986818  Size: SH
  1. Install the seat riser bar.

  2. Object Number: 981684  Size: SH
  3. Position the seat cushion frame assembly between the adjusters.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the seat cushion frame bolts.
  6. Tighten
    Tighten the bolts to 12 N·m (9 lb ft).

  7. Position the seat back frame assembly between the adjusters. Ensure that the locating triangles in the frame are properly seated in the mating holes in the adjusters.

  8. Object Number: 987624  Size: SH
  9. If equipped, install the outboard teardrop washer and bolt.
  10. Tighten
    Tighten the bolt to 35 N·m (26 lb ft).

  11. Install the outboard seat back frame nuts.
  12. Tighten
    Tighten the nuts to 17 N·m (13 lb ft).

  13. Install the inboard seat back frame nuts.
  14. Tighten
    Tighten the nuts to 17 N·m (13 lb ft).

  15. If you loosened the rear bolts on the seat cushion frame during removal, tighten them now.
  16. Tighten
    Tighten the bolts to 12 N·m (9 lb ft).


    Object Number: 875183  Size: SH

    Caution: The seat back frame springs are under tension. To avoid personal injury, use care when removing or installing the frame.

  17. Install the seat recliner handle and spring. Install the recliner handle bolt.
  18. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 876774  Size: SH
  19. Adjust the seat back until the hook ends of the springs are adjacent to the adjuster pins.

  20. Object Number: 873771  Size: SH
  21. Using a pair of channel lock® pliers, slide the springs from the notches in the frame to the pin.
  22. Adjust the seat back to ensure proper movement.
  23. If the seat is equipped with a lumbar support, perform the following procedure:
  24. 13.1. Pull the lumbar cable sleeve forward.
    13.2. Insert the barrel cable end to the lumbar actuator.
    13.3. Adjust the lumbar knob to ensure that the lumbar is operating correctly.

    Object Number: 981476  Size: SH
  25. Lower the seat back trim cover.
  26. Connect the lower J-hook retainer to the trim cover.
  27. On heated seats, connect the electrical connector to the seat heater.
  28. Install the seat cushion outer trim panel. Refer to Front Seat Cushion Outer Trim Panel Replacement .

  29. Object Number: 981202  Size: SH
  30. Install the seat belt buckle. Secure the buckle with the seat belt bolt.
  31. Tighten
    Tighten the bolt to 45 N·m (33 lb ft).


    Object Number: 981887  Size: SH
  32. Connect the seat belt warning wire to the seat adjuster.
  33. Install the front seat. Refer to Front Seat Replacement - Bucket .

Front Seat Adjuster Replacement 2-Way Fold Flat

The seat adjusters are exposed after the seat back recliners are removed. Refer to Front Seat Recliner Mechanism Replacement .