GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38778 Door Trim Pad Clip Remover

Removal Procedure

Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.


    Object Number: 669311  Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System in SIR.
  2. Adjust the front seat assembly up and forward in order to access the fasteners (1) at the rear of the front seat cushion assembly
  3. Remove the front seat cushion assembly fasteners (1), at the rear of the seat cushion.

  4. Object Number: 669309  Size: SH
  5. Adjust the front seat assembly towards the rear of the vehicle.
  6. Angle the front of the front seat cushion (1) up, in order to access the remaining front seat cushion assembly fasteners (2).
  7. Remove the front seat cushion assembly fasteners (2).
  8. Lift the front seat cushion assembly (1) away from the seat riser assembly.

  9. Object Number: 295170  Size: SH
  10. Disconnect the heated seat cushion electrical connector, if equipped with KA1.
  11. Disconnect the air lines for the adaptive lumbar, if equipped with AC9.
  12. Disconnect the wire harnesses retainers from the bottom of the seat cushion frame.
  13. Important: The lumbar switch knob (1) is part of the lumbar switch assembly. Do not remove the lumbar switch knob.


    Object Number: 510449  Size: SH
  14. Remove the knobs (5,6) from the seat switch.

  15. Object Number: 625751  Size: SH
  16. Remove the seat switch trim plate.

  17. Object Number: 334105  Size: SH
  18. Pull the front seat cushion cover up in order to expose the seat switch.
  19. Using the J 38778 remove the switch bracket retainers.

  20. Object Number: 625749  Size: SH
  21. Release the locking tabs on the switch mounting bracket, and remove the switches and bracket assembly from the seat bottom frame.
  22. Remove the seat cushion assembly.

Installation Procedure


    Object Number: 625749  Size: SH
  1. Install the seat switch to the seat cushion frame.

  2. Object Number: 625751  Size: SH
  3. Pull the seat cushion cover over the seat switch and align holes in the cover to the switch assembly.
  4. Engage the J channels to the seat cushion frame.
  5. Install the seat switch trim plate bezel.

  6. Object Number: 510449  Size: SH
  7. Install the knobs (5,6) to the switch.

  8. Object Number: 295170  Size: SH
  9. Connect the heated seat cushion electrical connectors, if equipped with KA1.
  10. Connect the air lines for the adaptive lumbar, if equipped with AC9.
  11. Attach the air line and wire harnesses to the seat cushion frame.

  12. Object Number: 669309  Size: SH
  13. Install the seat cushion assembly (1) to the seat riser.
  14. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  15. Install the front fasteners (2) to the seat cushion assembly (1).

  16. Object Number: 669311  Size: SH
  17. Adjust the front seat assembly up and forward in order to access the fasteners (1) at the rear of the front seat cushion assembly
  18. Install the seat cushion assembly fasteners (1) to the seat cushion assembly.
  19. Tighten
    Tighten the seat cushion assembly fasteners to 9 N·m (80 lb in).

  20. Angle the front of the front seat cushion up, in order to access the front seat cushion assembly fasteners.
  21. Tighten
    Tighten the seat cushion assembly fasteners to 9 N·m (80 lb in).

  22. Enable the SIR system. Refer to Enabling the SIR System in SIR.