GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the seat back pad and cover. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .
  2. Adjust the lumbar knob until the lumbar is at the position of the least support.

  3. Object Number: 987766  Size: SH
  4. Remove the lumbar cable end from the lumbar unit by compressing the unit while lifting out the barrel end of the cable assembly.

  5. Object Number: 987798  Size: SH
  6. Using a flat-bladed tool, twist out the upper portion of the lumbar unit from the seat frame cross wire.

  7. Object Number: 987938  Size: SH
  8. Remove the lower portion of the lumbar unit from the seat cross wire.
  9. Remove the lumbar unit.

Installation Procedure


    Object Number: 987938  Size: SH
  1. Install the lumbar unit to the lower portion of the seat back cross wire.

  2. Object Number: 987798  Size: SH
  3. Position the lumbar unit to the upper portion of the cross wire. Using a flat-bladed tool, twist the lumbar unit over the cross wire assembly.

  4. Object Number: 987766  Size: SH
  5. Compress the lumbar unit and connect the cable barrel end to the lumbar unit.
  6. Adjust the lumbar unit to ensure proper operation.
  7. Install the seat back pad and cover. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .