GM Service Manual Online
For 1990-2009 cars only

Rear Seat Back Cushion Hinge Replacement TrailBlazer EXT, Envoy XL, Envoy XUV

Removal Procedure

  1. Remove the seat from the vehicle. Refer to Rear Seat Replacement .
  2. Remove the inboard/outboard rear seat back cushion latch covers. Refer to Rear Seat Back Cushion Hinge Cover Replacement .

  3. Object Number: 828141  Size: SH
  4. Remove the rear center seat belt anchor nut (2), if replacing the left-hand seat inboard hinge.

  5. Object Number: 831437  Size: SH
  6. Remove the seat belt side buckle nut (2), if replacing the right-hand seat inboard hinge.
  7. Remove the seat back cover and pad high enough to expose the seat back mounting bolts. Refer to Rear Seat Back Cushion Cover and Pad Replacement .

  8. Object Number: 828223  Size: SH
  9. Remove the seat back mounting bolts (2) securing the rear seat back frame to the inboard/outboard rear seat back hinge assembly.
  10. Remove the seat cushion mounting bolts (1) securing the rear seat cushion frame to the inboard/outboard rear seat back hinge assembly.
  11. Remove the seat back assembly.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 828223  Size: SH
  1. Install the seat cushion mounting bolts (1) securing the rear seat cushion frame to the inboard/outboard rear seat back hinge assembly.
  2. Tighten
    Tighten all rear seat cushion mounting bolts to 25 N·m (18 lb ft).

  3. Install the seat back mounting bolts (2) securing the rear seat back frame to the inboard/outboard rear seat back hinge assembly.
  4. Tighten
    Tighten all rear seat back mounting bolts to 25 N·m (18 lb ft).


    Object Number: 831437  Size: SH
  5. Install the seat belt side buckle (1) to the seat with the seat belt anchor nut (2), if replacing the right-hand seat inboard hinge.
  6. Tighten
    Tighten the seat belt side buckle nut to 55 N·m (40 lb ft).


    Object Number: 828141  Size: SH
  7. Install the rear center seat belt anchor nut (2), if replacing the left-hand seat inboard hinge.
  8. Tighten
    Tighten all rear center seat belt anchor nut to 60 N·m (44 lb ft).

  9. Install the seat back cover and pad to the seat back. Refer to Rear Seat Back Cushion Cover and Pad Replacement .
  10. Install the inboard/outboard rear seat back cushion latch covers. Refer to Rear Seat Back Cushion Hinge Cover Replacement .
  11. Install the seat in the vehicle. Refer to Rear Seat Replacement .

Rear Seat Back Cushion Hinge Replacement TrailBlazer, Envoy, Rainier

Removal Procedure

  1. Partially remove the seat back cover and pad. Refer to Rear Seat Back Cushion Cover and Pad Replacement .

  2. Object Number: 753531  Size: SH
  3. Remove the latch release cables (1) from the latch release mechanism, located at the bottom of the seat back frame.
  4. Remove the head restraint release cable (2) from the left hand hinge bracket.

  5. Object Number: 753533  Size: SH
  6. Remove the bolts (2) that retain the latch bracket to the hinge bracket.
  7. Remove the bolts (1) that retain the hinge bracket to the seat back frame.
  8. Remove the hinge bracket from the seat back frame.

Installation Procedure

  1. Position the hinge bracket to the seat back frame.
  2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 753533  Size: SH
  3. Install the hinge bracket to the seat back frame with 2 bolts (1).
  4. Tighten
    Tighten the seat back hinge bolts to 35 N·m (26 lb ft).

  5. Install the latch bracket to the hinge bracket with 2 bolts (2).
  6. Tighten
    Tighten the seat back hinge bolts to 35 N·m (26 lb ft).


    Object Number: 753531  Size: SH
  7. Install the latch release cables (1) to the latch release mechanism, located at the bottom of the seat back frame.
  8. Install the head restraint release cable (2) the left hand hinge bracket.
  9. Install the seat back cover and pad. Refer to Rear Seat Back Cushion Cover and Pad Replacement .