GM Service Manual Online
For 1990-2009 cars only

Rear Seat Cushion Trim Panel Replacement TrailBlazer EXT, Envoy XL

Removal Procedure

  1. Remove the seat from the vehicle. Refer to Rear Seat Replacement .

  2. Object Number: 828144  Size: SH
  3. Remove the rear seat bracket trim covers (1).
  4. Remove the rear seat bracket mounting nuts (2).
  5. Remove the rear seat bracket.

  6. Object Number: 828229  Size: SH
  7. Remove the two bolts (2) securing the support (1) to the seat cushion trim panel.

  8. Object Number: 828226  Size: SH
  9. Remove the seat cover J-strips (1) from the seat cushion trim panel (2).

  10. Object Number: 828146  Size: SH
  11. Remove the screws securing the seat cushion trim panel to the seat frame.
  12. Remove the seat cushion trim panel.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 828146  Size: SH
  1. Install the screws securing the seat cushion trim panel to the seat cushion assembly.
  2. Tighten
    Tighten the rear seat cushion trim panel screws to 2 N·m (18 lb in).


    Object Number: 828226  Size: SH
  3. Install the seat cover J-strips (1) to the seat cushion trim panel (2).

  4. Object Number: 828229  Size: SH
  5. Install the two bolts (2) securing the support (1) to the seat cushion trim panel.
  6. Tighten
    Tighten the rear seat support bolts to 35 N·m (26 lb ft).


    Object Number: 828144  Size: SH
  7. Install the rear seat bracket with the four mounting nuts (2).
  8. Tighten
    Tighten the rear seat bracket mounting nuts to 25 N·m (18 lb ft).

  9. Install the rear seat bracket trim covers (1).
  10. Install the seat in the vehicle. Refer to Rear Seat Replacement .