GM Service Manual Online
For 1990-2009 cars only

Front Seat Adjuster Replacement Two-Way Manual

Removal Procedure

  1. Remove the front seat. Refer to Front Seat Replacement - Bucket .
  2. Place the seat upside down on a clean, protected surface.
  3. Remove the trim finish panels. Refer to Seat Cushion Outer Trim Panel Replacement .
  4. Remove the seat adjuster to seat cushion frame bolts.
  5. Remove the seat adjuster from the seat cushion frame.

  6. Object Number: 310454  Size: SH
  7. Remove the cross-wire and assist springs from the seat adjuster.
  8. Remove the cross-brace bolts.
  9. Separate the left and right seat adjusters.

Installation Procedure

Important: Before assembling the seat adjusters, make sure the tab bending downward at the center of the cross-brace faces towards the rear of the adjusters.


    Object Number: 310454  Size: SH
  1. Attach the cross-brace to the seat adjusters.
  2. Install the cross-brace bolts.
  3. Tighten
    Tighten the cross-brace bolts to 6 N·m (18 lb ft).

  4. Install the cross-wire and assist springs to the seat adjuster.
  5. Important: To ensure proper two-way seat adjuster alignment, install the adjuster assembly to the floor pan before attaching the adjuster to the seat cushion frame. The floor pan will act as an alignment fixture.

  6. Install the seat adjuster to the floor pan.
  7. Install the seat adjuster to floor pan bolts.
  8. Tighten
    Tighten the seat adjuster bolts to 42 N·m (31 lb ft).

  9. Install the seat assembly to the seat adjuster.
  10. Install the seat adjuster to cushion frame bolts.
  11. Tighten
    Tighten the seat adjuster to cushion frame bolts to 24 N·m (18 lb ft).

  12. Install the trim finish panels. Refer to Seat Cushion Outer Trim Panel Replacement .
  13. Install the front seat. Refer to Front Seat Replacement - Bucket .
  14. Connect any electrical connectors, if removed.

Front Seat Adjuster Replacement Six-Way Power

Removal Procedure

  1. Remove the front seat. Refer to Front Seat Replacement - Bucket .
  2. Place the front seat upside down on a clean, protected surface.
  3. Note the location of the power seat adjuster electrical wiring harness.
  4. Disconnect and remove the electrical wiring harness from the adjuster assembly.
  5. Remove the trim finish panels. Refer to Seat Cushion Outer Trim Panel Replacement .

  6. Object Number: 176219  Size: SH
  7. Remove the seat adjuster to cushion frame bolts.
  8. Remove the seat adjuster from the seat cushion frame.
  9. Remove the drive cables. Refer to Seat Horizontal and Vertical Drive Cable Replacement .
  10. Remove the cross-brace bolts.
  11. Remove the cross-brace and separate the adjusters.

Installation Procedure


    Object Number: 176219  Size: SH

    Important: Make sure both power seat adjusters are in phase with each other before attaching the cross-brace.

  1. Attach the cross-brace to the power seat adjusters.
  2. Install the cross-brace bolts.
  3. Tighten
    Tighten the cross-brace bolts to 6 N·m (53 lb in).

  4. Install the drive cables. Refer to Seat Horizontal and Vertical Drive Cable Replacement .
  5. Install the seat adjuster to the seat cushion frame.
  6. Install the seat adjuster to the cushion frame bolts.
  7. Tighten
    Tighten the seat adjuster to cushion frame bolts to 24 N·m (18 lb ft).

  8. Install the trim finish panels. Refer to Seat Cushion Outer Trim Panel Replacement .
  9. Install and connect the electrical wiring harness to the adjuster assembly.
  10. Install the front seat. Refer to Front Seat Replacement - Bucket .