GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Park Avenue 🢒 Body and Accessories 🢒 Seats 🢒 Front Seat Cushion Replacement

Removal Procedure
  1. Remove the front seat assembly. Refer to Seat Replacement .

    2. Object Number: 258228 Size: LH
  2. Remove the seat switch and bezel assembly (4,5,6). Refer to Power Seat Switch Replacement .
  3. On the 60/40 seat, remove the armrest assembly (3).
  4. Remove the 4 nuts.

    5. Object Number: 428075 Size: SH
  5. Disconnect the heated seat wire harness (1), if equipped.
  6. Disconnect the auxiliary power outlet electrical connector, if necessary.

    7. Object Number: 258228 Size: LH
  7. Remove the 4 nuts (9) on the bottom in each corner of the seat pan (13).
  8. Remove the seat pan and the seat cushion (15) as 1 piece.
  9. Remove the fastener retaining auxiliary power outlet, if necessary.
  10. Remove the power outlet.

    11. Object Number: 428072 Size: SH
  11. Remove the J-channel (1) from the following components:
    12. • The front-to-rear flaps
    • The side-to-side flaps
  12. Remove the push in retainer fastening the seat cover to the seat pan.
  13. Remove the fasteners retaining the seat cover to the seat switch bezel mounting opening.
  14. Remove the seat cushion cover and the seat cushion.

Installation Procedure

    Object Number: 258228 Size: LH
  1. Install the seat cushion (15) on the seat pan (13).
  2. Align the seat cushion cover (1) on the seat cushion (15).

    3. Object Number: 428075 Size: SH
  3. Feed the heated seat wire harness (1) through the cushion, if equipped.

    4. Object Number: 258228 Size: LH
  4. Work the seat cushion cover (1) over the sides of the cushion (15) and around the seat pan (13).

    5. Object Number: 428072 Size: SH
  5. Install the J-channel (1) on the following components:
    6. • The front-to-rear flaps
    • The side-to-side flaps

    Object Number: 258228 Size: LH
  6. Install the retainer fastening the seat cover to the seat pan.
  7. Refasten the seat cover to the seat switch bezel opening.
  8. Install the auxiliary power outlet if necessary.
  9. Install the seat pan (15) with the cushion and the cover on the seat frame assembly (11).

    10. 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.

  10. Install the 4 nuts (9).

    11. Tighten
    Tighten the seat pan nuts to 24 N·m (18 lb ft).

  11. Feed the wires from the power seat switch (4) through the side of the seat cushion cover (1).
  12. Install the seat switch (4) and the bezel assembly (6). Refer to Power Seat Switch Replacement .
  13. Install the armrest assembly (3), if equipped.
  14. Install the 4 nuts in the armrest.

    15. Tighten
    Tighten the armrest nuts to 24 N·m (18 lb ft).

  15. Connect the electrical connector.
  16. Install the front seat assembly. Refer to Seat Replacement .