GM Service Manual Online
For 1990-2009 cars only

Front Seat Lumbar Support Replacement Luxury (Y91)

Removal Procedure

  1. Remove the bucket seat from the vehicle. Refer to Bucket Seat Replacement .
  2. Remove the seat back cover and pad from the seat back frame. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .

  3. Object Number: 506778  Size: SH
  4. Disconnect the lumbar plate cable (1) from the lumbar plate.

  5. Object Number: 506791  Size: SH
  6. Pull rearward on the lumbar plate corners to release it from the seat back frame.

  7. Object Number: 506820  Size: SH
  8. Remove the lumbar plate from the seat back frame.

Installation Procedure


    Object Number: 506820  Size: SH
  1. Install the lumbar plate to the seat back frame.

  2. Object Number: 506791  Size: SH
  3. Snap the corners of the lumbar plate to the seat back frame.

  4. Object Number: 506778  Size: SH
  5. Install the lumbar plate cable (1) to the lumbar plate.
  6. Install the seat back cover and pad to the seat back frame. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .
  7. Install the bucket seat in the vehicle. Refer to Bucket Seat Replacement .