GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


Object Number: 1756138  Size: SH

Remove the lumbar support knob.

Installation Procedure


Object Number: 1756138  Size: SH

Install the lumbar support knob.

Removal Procedure


    Object Number: 2000542  Size: SH
  1. Remove the front bucket seat. Refer to Bucket Seat Replacement.
  2. Remove the front seat head restraint. Refer to Driver or Passenger Seat Head Restraint Replacement.
  3. Important: The lumbar knob (1) is a single use component and must be replaced after removal.

  4. Using a suitable tool, remove the lumbar knob (1) from the seat assembly (2).
  5. Remove the lumbar mechanism screws (3).
  6. Remove the front seat back. Refer to Front Seat Back Replacement.

  7. Object Number: 2000559  Size: SH
  8. Remove the front seat back padding (1) from the seat frame (2).
  9. Using a suitable tool, remove the lumbar support mechanism (3) from the seat frame (2) by disengaging the clips (4) and un-hooking the lumbar wires (5).

Installation Procedure


    Object Number: 2000559  Size: SH
  1. Engage the lumbar support mechanism (3) onto the front seat frame (2), by engaging the clips (4) and the inserting the lumbar wires (5).
  2. Install the seat back padding (1) onto the seat frame (2).
  3. Notice: Refer to Fastener Notice in the Preface section.

    Important: The lumbar knob (1) is a single use component and must be replaced after removal.


    Object Number: 2000542  Size: SH
  4. Install the lumbar mechanism screws (3).
  5. Tighten
    Tighten the lumbar mechanism screws to 3.0 N·m (2.21 lb ft).

  6. Install the lumbar knob (1) onto the seat assembly (2).
  7. Install the front seat back. Refer to Front Seat Back Replacement.
  8. Install the front seat head restraint. Refer to Driver or Passenger Seat Head Restraint Replacement.
  9. Install the front buck seat. Refer to Bucket Seat Replacement.