GM Service Manual Online
For 1990-2009 cars only

Driver or Passenger Seat Back Cushion Heater Replacement Non-Fold Flat

Removal Procedure

  1. Remove the front seat. Refer to Front Seat Replacement - Bucket .
  2. Remove the outer trim panel from the seat cushion. Refer to Front Seat Cushion Outer Trim Panel Replacement .
  3. Remove the armrest from the seat. Refer to Front Seat Armrest Replacement .
  4. Disconnect the electrical connector from the seat heat module.

  5. Object Number: 866891  Size: SH
  6. Disconnect the lower J-hook retainer from the seat back trim cover.
  7. Carefully lift the trim cover, disengaging the hook and loop retainers until the heater element is exposed.

  8. Object Number: 987728  Size: SH
  9. Gently pull on the heater element in order to remove the element from the seat foam. Be careful not to damage the foam pad.

Installation Procedure


    Object Number: 987728  Size: SH
  1. Peel off the self-stick tape from the back side of the heater element.
  2. Position the heater element over the seat foam pad. Press firmly to engage the adhesive.
  3. Lower the seat back trim cover, pressing on the hook and loop retainers in order to engage the retainers.

  4. Object Number: 866891  Size: SH
  5. Connect the lower J-hook retainer to the seat back trim.
  6. Connect the electrical connector to the heater element module.
  7. Install the armrest to the seat. Refer to Front Seat Armrest Replacement .
  8. Install the outer trim panel to the seat cushion. Refer to Front Seat Cushion Outer Trim Panel Replacement .
  9. Install the front seat. Refer to Front Seat Replacement - Bucket .

Driver or Passenger Seat Back Cushion Heater Replacement Fold Flat

Removal Procedure

  1. Remove the front seat. Refer to Front Seat Replacement - Bucket .

  2. Object Number: 981031  Size: SH
  3. Remove the screws from the outboard recliner trim panel. Remove the trim panel.

  4. Object Number: 981057  Size: SH
  5. Remove the screws from the inboard recliner trim panel. Remove the trim panel.
  6. Remove the head restraint. Refer to Front Seat Head Restraint Replacement .
  7. Disconnect the electrical connector from the seat heater element.

  8. Object Number: 873654  Size: SH
  9. Remove the bolts from the seat back frame. Remove the seat back assembly.

  10. Object Number: 981048  Size: SH
  11. Remove the screws from the back panel. Remove the back panel.
  12. Remove the armrest. Refer to Front Seat Armrest Replacement .

  13. Object Number: 981476  Size: SH
  14. Disconnect the lower J-hook retainer from the seat back trim cover.
  15. Lift the trim cover, carefully disengaging the hook and loop retainers until the heater element is exposed.

  16. Object Number: 987728  Size: SH
  17. Gently pull to remove the element from the seat back pad. Be careful not to damage the pad.

Installation Procedure


    Object Number: 987728  Size: SH
  1. Peel off the self-stick paper backing from the heater element.
  2. Position the element on the pad and press firmly to install the element.
  3. Lower the seat back trim cover. Press on the hook and loop retainers to engage the retainers.

  4. Object Number: 866891  Size: SH
  5. Connect the lower J-hook retainer on the seat back trim cover.
  6. Install the armrest. Refer to Front Seat Armrest Replacement .
  7. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 981048  Size: SH
  8. Position the seat back panel. Secure the panel with the screws.
  9. Tighten
    Tighten the screws to 2 N·m (18 lb in).


    Object Number: 873654  Size: SH
  10. Position the seat back assembly between the fold-flat recliners. Secure with the seat back bolts.
  11. Tighten
    Tighten the bolts to 70 N·m (52 lb ft).

  12. Connect the electrical connectors to the seat heater element.
  13. Install the head restraint. Refer to Front Seat Head Restraint Replacement .

  14. Object Number: 981057  Size: SH
  15. Position the inboard recliner trim panel. Secure with the panel screws.
  16. Tighten
    Tighten the screws to 2.5 N·m (22 lb in).


    Object Number: 981031  Size: SH
  17. Position the outboard recliner trim panel. Secure with the panel screws.
  18. Tighten
    Tighten the screws to 2.5 N·m (22 lb in).

  19. Install the front seat. Refer to Front Seat Replacement - Bucket .