GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Classic - 2WD 🢒 Seats 🢒 Seat Hardware, Trim, and Upholstery 🢒 Seat Cushion Trim Cover and Pad Replacement

Removal Procedure

    Object Number: 378531 Size: SH
  1. Remove the front nuts (2) on the underside of the seat cushion.
  2. Remove the front seat trim panel. Refer to Front Seat Trim Panel Replacement .

    3. Object Number: 407184 Size: SH
  3. Unsnap the lumbar cable (6). Disconnect the lumbar wire harness if equipped with power lumbar.
  4. Disconnect the electrical connectors.

    5. Object Number: 811855 Size: SH
  5. Remove the pressure sensor (2) from the front passenger seat frame, if equipped with the Inflatable Restraint Passenger Presence System.

    6. Object Number: 378531 Size: SH
  6. Lift the seat cushion up off the rear plastic holders (1) on the underside of the seat cushion, and pull forward.
  7. Remove the seat switch bezel. Refer to Driver Seat and Passenger Seat Adjuster Switch Bezel Replacement .

    8. Object Number: 407184 Size: SH
  8. Remove the lumbar actuator (5).

    9. Object Number: 386197 Size: SH
  9. Unclip the seat trim cover from the seat cushion frame.

    10. Object Number: 386196 Size: SH
  10. Using a side motion, carefully separate the seat cushion trim cover from the seat cushion pad.

    11. Caution: Replace the passenger presence system as a complete assembly to prevent possible injury to the occupant. The bladder, the pressure sensor, the seat cushion, and the control module are assembled and calibrated as a unit. Using only some of the components in the service kit will cause the passenger presence system to operate improperly.

  11. If replacing the front passenger seat cushion you must also replace the Inflatable Restraint Passenger Presence System. Refer to Inflatable Restraint Passenger Presence System Replacement - Front .
  12. Remove the pad from the seat cushion frame.
  13. Remove the seat cushion heater element, if equipped. Refer to Driver or Passenger Seat Cushion Heater Replacement .

Installation Procedure
  1. Install the seat cushion heater element, if equipped. Refer to Driver or Passenger Seat Cushion Heater Replacement .
  2. Install the Inflatable Restraint Passenger Presence System. Refer to Inflatable Restraint Passenger Presence System Replacement - Front .
  3. Install the seat cushion pad to the seat cushion frame.

    4. Object Number: 386196 Size: SH
  4. Using a side motion, carefully pull the seat cushion cover onto the frame pad.

    5. Object Number: 386197 Size: SH
  5. Attach the seat trim cover to the seat cushion frame.

    6. Object Number: 407184 Size: SH
  6. Install the lumbar actuator (5).
  7. Install the seat switch bezel. Refer to Driver Seat and Passenger Seat Adjuster Switch Bezel Replacement .

    8. Object Number: 378531 Size: SH
  8. Place the cushion on the rear plastic holders (1) on the underside of the seat cushion, and push rearward.

    9. Object Number: 407184 Size: SH
  9. Connect the lumbar cable to the underside of the seat cushion (6). Connect the lumbar wire harness, if equipped with power lumbar.

    10. Object Number: 811855 Size: SH
  10. Install the pressure sensor (2) to the front passenger seat frame, if equipped with the Inflatable Restraint Passenger Presence System.
  11. Connect the electrical connectors.

    12. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 378531 Size: SH
  12. Install the front nuts (2) onto the studs on the underside of the cushion.

    13. Tighten
    Tighten the nuts to 21 N·m (15 lb ft).

  13. Install the front seat trim panel. Refer to Front Seat Trim Panel Replacement .
  14. Re-zero the Inflatable Restraint Passenger Presence System. Refer to Passenger Presence System Programming and Setup .