GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Caprice WM 🢒 Seats 🢒 Seat Hardware, Trim, and Upholstery 🢒 Seat Lumbar Sub System Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.

  1. Disconnect the battery ground cable from the battery. Refer to Battery Negative Cable Disconnection and Connection .

    2. Caution: Refer to SIR Caution in the Preface section.

  2. Disable the SIR system. Refer to SIR Disabling and Enabling .
  3. Remove the front seat. Refer to Front Seat Replacement - Bucket .
  4. Remove the front seat-back. Refer to Front Seat Back Replacement .
  5. Remove the front seat cover and pad. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .
  6. Remove the front head restraints. Refer to Front Seat Head Restraint Replacement .
  7. Remove the front head restraints guides. Refer to Front Seat Head Restraint Guide Replacement .

    8. Object Number: 1943568 Size: SH
  8. Remove the retainer (2) two places, attaching the lumbar support assembly (1) to the seat-back frame.

    9. Object Number: 1943569 Size: SH
  9. Depress the retaining tab (2) and from the inner side of the seat-back frame, rotate the lumbar support shaft (1) and withdraw from the seat-back frame.
  10. Repeat this procedure for the opposite side.

    11. Object Number: 1943574 Size: SH
  11. Disconnect the spring (1), two places, attaching the lumbar support assembly (2) to the head restraint frame.

    12. Object Number: 1943612 Size: SH
  12. Disconnect the electrical connectors (1) attached to seat back harness for power & memory.

    13. Object Number: 1943573 Size: SH
  13. Remove the lumbar support assembly (1).

Installation Procedure

    Object Number: 1943573 Size: SH
  1. Install the lumbar support assembly (1) to the seat-back frame.

    2. Object Number: 1943612 Size: SH
  2. Connect the electrical connectors (1) attached to seat back harness for power & memory.

    3. Object Number: 1943574 Size: SH
  3. Connect the spring (1) two places, attaching the lumbar support assembly (2) to the head restraint frame.

    4. Object Number: 1943596 Size: SH
  4. Insert the lumbar support shaft (1) to the seat-back frame and rotate anti-clockwise until it locks in front of the retaining tab (2).

    5. Object Number: 1943568 Size: SH
  5. Install the lumbar support assembly (1) to seat-back frame retainers (2).
  6. Install the front seat cover and pad. Refer to Front Seat Back Cushion Cover and Cushion Pad Replacement .
  7. Install the front head restraints guides. Refer to Front Seat Head Restraint Guide Replacement .
  8. Install the front head restraints. Refer to Front Seat Head Restraint Replacement .
  9. Install the front seat. Refer to Front Seat Replacement - Bucket .

    10. Caution: Refer to SIR Caution in the Preface section.

  10. Enable the SIR system. Refer to SIR Disabling and Enabling .
  11. Connect the battery ground cable to the battery. Refer to Battery Negative Cable Disconnection and Connection .
  12. Test the seat for correct mechanical and electrical operation.