GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 DeVille 🢒 Body and Accessories 🢒 Seats 🢒 Front Seat Cushion Cover Replacement

Removal Procedure
  1. Remove the seat assembly. Refer to Seat Replacement .
  2. Remove the seat back. Refer to Seat Back Frame Replacement .
  3. Disconnect the electrical connectors, if equipped with the heated seats.
  4. Remove the J-retainers at the bottom of the seat cushion perimeter.

    5. Object Number: 401802 Size: SH
  5. Remove the trim cover from the cushion.
  6. In order to expose the bonded area, roll the trim cover away from the foam. Begin at the edge of the trim cover.
  7. Fold the glue strip back with the trim cover. Hold the trim cover with one hand.
  8. Press down with the other hand on the foam at the edge of the bonded area separating the foam and trim.
  9. Gently pull back on the trim as the foam and the trim separate.

Installation Procedure

    Object Number: 401630 Size: SH
  1. Install the foam cushion on the base.
  2. Install the trim cover to the cushion.
  3. Apply a 13 mm (1/2 in) bead of GM P/N 12377914 or Special Bostik Glue in the first top horizontal channel.

    4. Use a 138°C (360°F) hot glue gun.

  4. Carefully place the trim cover down over the foam in order to ensure that the trim cover seam is positioned into the glue trench within 30 seconds of the glue application.
  5. Pull the trim cover down:
    6. • Use a straight edge of the same length as the glued seam.
    • Apply downward pressure (1-4 psi).
    • Hold the trim cover for 1 minute.
  6. Pull the trim cover down:
    7. • Use 2 straight edges of the same length as the seams.
    • Apply downward pressure (1-4 psi).
    • Hold the trim cover for 1 minute.
  7. Lift the trim cover.

    8. Apply a 13 mm (1/2 in) bead of glue in the final channel.

  8. Pull the trim cover down:
    9. • Use 2 straight edges (1) of the same length as the seams.
    • Apply downward pressure (1-4 psi).
    • Hold the trim cover for 1 minute.

    Object Number: 315302 Size: SH
  9. Connect the electrical connectors, if equipped with a heated seat.
  10. Install the J-retainers at the base of the seat cushion.
  11. Install the seat back. Refer to Seat Back Frame Replacement .

    12. 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.

  12. Connect the electrical connectors, if equipped with a heated seat.

    13. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).

  13. Install the seat assembly. Refer to Seat Replacement .