GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Riviera 🢒 Body and Accessories 🢒 Seats 🢒 Rear Seat Back Cushion Replacement

Removal Procedure
  1. Remove the seat cushion. Refer to Rear Seat Cushion Replacement .
  2. Remove the lap belt nuts.
  3. Remove the lap belts.

    4. Object Number: 287855 Size: SH
  4. On seat backs with pass-through, remove the 2 retainers in the trunk.

    5. The retainers are secured near the pass-through opening.

  5. Lift up the seat back (2). This action releases the guide wires from the hooks (1,3) and the body slot.
  6. Remove the seat back (2).

Installation Procedure

    Object Number: 287855 Size: SH
  1. Install the seat back (2).
  2. Engage the guide wires into the hooks (1,3).
  3. Install the lap belts.

    4. 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.

  4. Install the lap belt nuts.

    5. Tighten
    Tighten the lap belt nuts to 35 N·m (26 lb ft).

  5. Install the seat backs with pass-through.
  6. Install the 2 retainers in the trunk in order to secure to the armrest.
  7. Install the seat cushion. Refer to Rear Seat Cushion Replacement .