Seat System Buick Century VI

Specifications

Fastener Tightening Specifications

Scheme 1

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Diagnostic Starting Point - Seats

Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to SYMPTOMS - SEATS in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Symptoms - Seats

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Seat Systems. Refer to CHECKING AFTERMARKET ACCESSORIES in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect the power seat for proper mechanical operation. (Scheme 30)

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Power Seat Inoperative»(/buick/century/vi-1997-2005/remont/seats/#seat-system)
2. «Heated Seat Always On»(/buick/century/vi-1997-2005/remont/seats/#seat-system)
3. «Heated Seat Inoperative»(/buick/century/vi-1997-2005/remont/seats/#seat-system)

Scheme 24

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Scheme 30

Removal Procedure

1. If the seat is equipped with an air bag, refer to «AIR BAG SAFETY PRECAUTIONS»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__air-bag-safety-precautions) in SIR. Disable the SIR system. Refer to «ZONE 7»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__zone-7) in SIR.
2. Remove the head restraint. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the track covers from the front seat adjuster. Refer to «SEAT ADJUSTER TRACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Position the front seat forward to between the mid-forward position and the full forward position. Raise the seat to the full-up position.
5. Remove the bolts which secure the front seat adjuster to the floor pan.
6. Remove the nut from the seat belt anchor plate.
7. Disconnect the front seat electrical connectors.
8. Tip the seat forward to remove the seat from the front hook attachments.
9. Remove the front seat from the vehicle.

Installation Procedure

1. Position the front seat into the vehicle.
2. Tip the front seat forward to engage the front hook attachments.
3. Connect the front seat electrical connectors. NOTE: 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 bolt which secure the front seat adjuster to the floor pan. Tighten Tighten the bolts to 42 N.m (31 lb ft).
5. Reposition the front seat to the full back position.
6. Install the track adjuster covers. Refer to «SEAT ADJUSTER TRACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
7. Install the nut to the seat belt anchor plate. Tighten Tighten the nut to 42 N.m (31 lb ft).
8. Install the head restraint. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
9. Enable the SIR system if the seat is equipped with an air bag. Refer to «ZONE 7»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems) in SIR.

Scheme 31

1. If the seat is equipped with an air bag, refer to «AIR BAG SAFETY PRECAUTIONS»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__air-bag-safety-precautions) in SIR. Disable the SIR system. Refer to «ZONE 7»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__zone-7) in SIR.
2. Remove the head restraint. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the track covers from the front bucket seat adjuster. Refer to «SEAT ADJUSTER TRACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Position the bucket seat in the full forward to the mid-forward position. Raise the seat to the full-up position.
5. If the power seat motor is not operable and the bolts that secure the adjuster to the floor pan are not accessible, perform the following procedure: 5.1. From the front of the seat, disconnect both drive cable housings at the horizontal drive motor (2), which is located at the front of the seat adjuster. 5.2. Attach a drill motor to a drive cable (1). 5.3. Alternately run both sides of the adjuster forward until the rear seat bolts are accessible.
6. If you can use the seat adjuster, reset the adjuster to make the 2 horizontal drive screws the same length between the drive bracket (3) and the anchor bracket (2).
7. Attach the cable housings (4) to the motor and straighten the housings between the motor (1) and the drive brackets (3).
8. Remove the anchor plate nut from the bucket seat belt.
9. Remove the bolts which secure the seat adjuster to the floor pan at the rear of the seat.
10. Tip the seat forward and disconnect the following connectors, if equipped: The power seat electrical connector The electrical seat heater connector The driver side air bag electrical connector
11. Disengage the bucket seat hook attachments from the floor pan.
12. Remove the bucket seat from the vehicle.

1. Position the bucket seat into the vehicle.
2. Engage the front hook attachments to the floor pan.
3. Tip the seat forward and connect the following connectors, if equipped: The power seat electrical connector The electrical seat heater connector The driver side air bag electrical connector NOTE: 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 bolts which secure the front bucket seat adjuster to the floor pan. Tighten Tighten the bolts to 42 N.m (31 lb ft).
5. Install the adjuster track covers. Refer to «SEAT ADJUSTER TRACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
6. Install the nut to the seat belt anchor plate. Tighten Tighten the nut to 42 N.m (31 lb ft).
7. Install the head restraint. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
8. Enable the SIR system if the seat is equipped with air bag. Refer to «ZONE 7»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems) in SIR.
9. Inspect the bucket seat for proper operation and adjustment.
10. Position the seat to the original position.

1. Remove the front seat from the vehicle. Refer to the following procedures: «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system)
2. Remove the seat cushion cover from the seat cushion. Refer to «SEAT CUSHION COVER REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT CUSHION COVER REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the seat cushion from the seat frame.

1. Install the front seat cushion to the seat frame.
2. Install the cushion cover to the seat cushion. Refer to «SEAT CUSHION COVER REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT CUSHION COVER REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Install the seat. Refer to the following procedures: «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system)

1. Remove the front seat from the vehicle. Refer to «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the front seat armrest from the front seat. Refer to «ARMREST REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the front seat back. Refer to «SEAT BACK REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Remove the front seat outer trim bracket.
5. Disconnect the electrical connector for the heated seat, if equipped.
6. Unfasten the J-hook retainers on all sides of the front seat cushion cover.
7. Unfasten the retainers from the seat frame on the bottom of the front seat cushion.
8. Unfasten the retainer from the front seat frame at the seat belt.
9. Remove the hog rings from the rear of the front seat cushion cover.
10. Unfasten the hook and the loop retainers securing the front seat cushion cover to the cushion.
11. Remove the front seat cushion cover from the front seat cushion.
12. Remove the J-hook retainers from the front seat frame, if required.

1. Install the J-hook retainers to the front seat frame, if required.
2. Align the front seat cushion cover to the front seat cushion.
3. Install the front seat cushion cover onto the front seat cushion.
4. Install the hog rings to the rear of the front seat cushion cover.
5. Fasten the J-hook retainers on all sides of the front seat cushion cover.
6. Fasten the retainers to the front seat frame on the bottom of the front seat cushion.
7. Fasten the retainer to the front seat frame at the seat belt.
8. Fasten the hook and the loop retainers securing the front seat cushion cover to the cushion, by pressing in place until fully seated.
9. Connect the electrical connector for the heated seat, if equipped.
10. Install the front seat outer trim bracket.
11. Install the front seat back. Refer to «SEAT BACK REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
12. Install the front seat armrest from the front seat. Refer to «ARMREST REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
13. Install the front seat to the vehicle. Refer to «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the front seat from the vehicle. Refer to «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the front seat trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Disconnect the electrical connector for the heated seat, if equipped.
4. Unfasten the J-hook retainers on all sides of the seat cushion cover.
5. Unfasten the hook and the loop retainers that secure the seat cushion cover to the cushion.
6. Remove the seat cushion cover from the seat cushion.

1. Align the seat cushion cover to the seat cushion.
2. Install the seat cushion cover onto the seat cushion.
3. Fasten the J-hook retainers on all sides of the seat cushion cover.
4. Fasten the hook and the loop retainers that secure the cover to the cushion, by pressing in place until fully seated.
5. Connect the electrical connector for the heated seat, if equipped.
6. Install the front seat trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
7. Install the front seat. Refer to «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the front seat from the vehicle. Refer to the following procedures: «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system)
2. Remove the front seat back from the front seat. Refer to «SEAT BACK REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the front seat cushion cover from the front seat cushion. Refer to «SEAT CUSHION COVER REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT CUSHION COVER REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Remove the front seat cushion from the front seat frame. Refer to «SEAT CUSHION REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
5. Remove the front seat recliner assembly from the front seat cushion frame. Refer to «SEAT BACK RECLINER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
6. Remove the bolts from the front bucket seat cushion frame to the front seat track adjusters.
7. Remove the front seat cushion frame from the front seat track adjusters.
8. Remove the bolts from the front split bench seat frame to the front seat track adjusters.
9. Remove the front seat cushion frame from the front seat track adjusters.

Scheme 32

1. Position the front seat cushion frame to the front seat adjusters.
2. Install the bolts to the bucket seat cushion frame to the front seat track adjusters. NOTE: 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.
3. Install the bolts to the front split bench seat frame to the front seat track adjusters. Tighten Tighten the bolts to 25 N.m (18 lb ft).
4. Install the front seat recliner assembly to the front seat cushion frame. Refer to «SEAT BACK RECLINER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
5. Install the front seat cushion to the front seat cushion frame. Refer to «SEAT CUSHION REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
6. Install the front seat cushion cover to the front seat cushion. Refer to «SEAT CUSHION COVER REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT CUSHION COVER REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
7. Install the front seat back to the front seat. Refer to «SEAT BACK REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
8. Install the front seat to the vehicle. Refer to the following procedures: «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system)

1. Remove the front seat from the vehicle. Refer to «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the front seat riser trim cover. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the front seat armrest from the front seat. Refer to «ARMREST REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Remove the front center seat belt buckle from the front seat. Refer to Seat Belt Buckle Replacement - Center Front in Seat Belts.
5. Disconnect the J-hook retainers at each end of the front seat cushion and pull the front seat cushion cover open to expose the seat frame hinge.
6. Disconnect the J-hook retainers at the rear of the front seat cushion and pull open the front seat cushion cover to expose the seat frame hinge.
7. Remove the front seat back recliner roll pins from the seat back hinge.
8. Remove the front seat back bolts from the seat back hinge.
9. Lift up the front seat back and set it down on the front seat cushion.
10. Pull out the heated seat cable and the side air bag wire harness from the front seat cushion/frame area.
11. Disconnect the electrical connector for the heated seat, if equipped.
12. Remove the front seat back.

1. Position the front seat back on the front seat cushion.
2. Route the lumbar heated seat cable and the side air bag wire harness to the front seat cushion/frame area.
3. Connect the electrical connector for the heated seat, if equipped. NOTE: 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 front seat back hinge bolts (1) to the seat back hinge. Tighten Tighten the bolts to 25 N.m (18 lb ft).
5. Install new front seat back recliner roll pins to the seat back hinge.
6. Connect the J-hook retainers at the rear of the front seat cushion.
7. Connect the J-hook retainers at each end of the front seat cushion.
8. Install the front seat riser trim cover. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
9. Install the front seat armrest in the front seat. Refer to «ARMREST REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
10. Install the front center seat belt buckle to the front seat. Refer to Seat Belt Buckle Replacement - Center Front in Seat Belts.
11. Inspect the front seat back for proper operation.
12. Install the front seat in the vehicle. Refer to «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the front seat from the vehicle. Refer to «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the front seat riser trim cover. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Disconnect the J-hook retainers at each end of the front seat cushion and pull the front seat cushion cover open to expose the seat frame hinge.
4. Disconnect the J-hook retainers at the rear of the front seat cushion and pull open the front seat cushion cover to expose the seat frame hinge.
5. Remove the front seat back recliner roll pins from the seat back hinge.
6. Remove the front seat back hinge bolts (1) from the seat back hinge.
7. Lift up the front seat back and set it down on the front seat cushion.
8. Pull out the heated seat cable and the side air bag wire harness from the front seat cushion frame area.
9. Remove the front seat back.

Scheme 33

1. Position the front seat back on the front seat cushion.
2. Route the heated seat cable and the side air bag wire harness to the front seat cushion/frame area. NOTE: 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.
3. Install the front seat back hinge bolts (1) to the seat back hinge. Tighten Tighten the bolts to 24 N.m (18 lb ft).
4. Install new front seat back recliner roll pins to the seat back hinge.
5. Connect the J-hook retainers at the rear of the front seat cushion.
6. Connect the J-hook retainers at each end of the front seat cushion.
7. Install the front seat riser trim cover. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
8. Inspect the front seat back for proper operation.
9. Install the front seat in the vehicle. Refer to «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Disable the SIR system if the seat is equipped with air bag. Refer to «ZONE 7»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__zone-7) in SIR.
2. Remove the head restraint. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Position the seat full up and all the way back.
4. Disconnect the connector for the heated seat back, if equipped.
5. Position the seat full forward and the seat back full up.
6. Unfasten the J-hook retainers at the bottom of the seat back cover.
7. Position the seat back full down.
8. Reach inside of the front seat back cover and unfasten the hook and the loop retainers securing the front seat back cover to the pad.
9. Position the seat back to the vertical position.
10. Remove the front seat head restraint retainers. Refer to «HEAD RESTRAINT RETAINER REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
11. Unfasten the seat back cover from the retainer at the side impact airbag using a small curved bladed tool first to gain access to the front seat back material.
12. Unfasten the seat back cover from the retainer at the side impact airbag, by pressing in and pulling down on the seat back cover.
13. Remove the rear screw from the seat trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
14. Pull out the front seat back cover end flaps, 3 flaps on each side.
15. Pull the electrical harness for the seat back heater up through the seat cushion.
16. Remove the front seat back cover from the seat back, by pulling the seat back cover up and over the pad.

1. Position the front seat back cover to the pad.
2. Pull the seat back cover over the pad and align the hook and the loop retainers.
3. Use firm hand pressure in order to fasten the hook and the loop retainers, securing the front seat back cover to the pad.
4. Install the front seat head restraint retainers. Refer to «HEAD RESTRAINT RETAINER REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
5. Install the seat back cover to the retainer at the side impact airbag, by pressing in and pulling down on the seat back cover.
6. Fasten the J-hook retainer at the bottom of the seat back cover.
7. Install the electrical harness for the seat back heater through the seat cushion.
8. Install the front seat back cover end flaps, 3 flaps on each side.
9. Install the rear screw from the seat trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
10. Install the front seat head restraint. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
11. Connect the electrical connector for the heated seat back, if equipped.
12. Enable the SIR system if the seat is equipped with an air bag. Refer to «ZONE 7»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems) in SIR.

1. Remove the front seat back cover. Refer to «SEAT BACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the front seat back pad from the seat frame.

1. Install the front seat back pad to the seat frame.
2. Install the front seat back cover. Refer to «SEAT BACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the front seat back. Refer to «SEAT BACK REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the front seat back pad from the front seat back frame. Refer to «SEAT BACK PAD REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the inflatable restraint, left side impact module, if equipped. Refer to «REMOVAL & INSTALLATION (SIDE IMPACT)»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__removal-installation-side-impact) in SIR.

1. Install the inflatable restraint, left side impact module, if equipped. Refer to «REMOVAL & INSTALLATION (SIDE IMPACT)»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__removal-installation-side-impact) in SIR.
2. Install the front seat back pad to the front seat back frame. Refer to «SEAT BACK PAD REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Install the front seat back. Refer to «SEAT BACK REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the front seat from the vehicle. Refer to the following procedures: «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system)
2. Pull back the front seat back cover. Refer to «SEAT BACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Pull back the front seat cushion cover in order to expose the front seat recliner assembly. Refer to «SEAT CUSHION COVER REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT CUSHION COVER REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Remove the roll pins from the front seat recliner assembly.
5. Remove the front seat recliner assembly from the front seat cushion frame.

Scheme 34

1. Install the front seat recliner assembly to the front seat cushion frame. IMPORTANT: Install NEW roll pins.
2. Install the new roll pins to the front seat recliner assembly.
3. Pull back the front seat cushion cover. Refer to «SEAT CUSHION COVER REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT CUSHION COVER REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Pull back the front seat back cover. Refer to «SEAT BACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
5. Install the front seat to the vehicle. Refer to the following procedures: «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) «SEAT REPLACEMENT - SPLIT BENCH»(/buick/century/vi-1997-2005/remont/seats/#seat-system)

1. Use a small flat-bladed tool in order to release the snap-ring retainer from the base of the front seat back recliner handle.
2. Remove the seat back recliner handle from the front seat.

1. Install the snap-ring retainer to the base of the front seat back recliner handle.
2. Install the front seat back recliner handle to the front seat, pressing into place until fully seated.

Scheme 35

Scheme 36

1. If one side of the seat adjuster is not working, perform the following procedure: 1.1. The horizontal drive motor (1) and drive cables (4) are located at the front of the seat. Check to see if both cables are straight. If a cable is bent an end will be pulled out of the drive motor or drive screw. Straighten the cable. The seat switch may have to he toggled back and forth to get the cable ends to properly seat. 1.2. Run the seat forward until the seat removal bolts are accessible. 1.3. Once the seat is removed the cables must be examined to assure that no damage has occurred. 1.4. Also, the two sides of the seat adjuster will now be out of sync and must be readjusted or the adjuster may be noisy and the motor may overheat and fail. Use the following steps for adjustment. Tip the seat rearward. Reconnect the adjuster to the power switch. Run the seat adjuster rearward until the drive bracket (3) and the anchor bracket (2) are together on one side of the adjuster. Disconnect the drive cable on that side and run the opposite side rearward until its brackets touch. Re-attach the cables (4) to the motor and make sure they are straight between the motor (1) and the drive brackets (3).
2. If the power seat motor is not operable, and the bolts that secure the adjuster to the floor pan are not accessible, perform the following procedure: From the front of the seat, disconnect both drive cables at the horizontal drive motor (2), which is located at the front of the seat adjuster. Attach a drill motor to a drive cable (1). Alternately run both sides of the adjuster forward until the seat removal bolts are accessible.
3. Remove the front seat. Refer to «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Remove the seat trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
5. Remove the seat belt bracket (2) on the door side of the seat. The new seat adjuster does not have this part.
6. Remove the seat belt buckle. Refer to Seat Belt Buckle Replacement - Left Front in Seat Belts.
7. Remove the electrical harness from the power seat motor harness.
8. Remove the electrical harness clip and disconnect the harness retainer from the adjuster bracket.
9. Recline the seat back to the full reclined position.
10. Remove the trim cover J-hooks from the seat front and from the seat sides.
11. Fold back the seat trim and the pad to access the adjuster bolts.
12. Remove the 4 adjuster bolts.
13. Remove the seat adjuster.

1. Position the adjuster on the seat frame. NOTE: 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.
2. Install the adjuster bolts. Tighten Tighten the bolts to 25 N.m (18 lb ft).
3. Return the seat pad and the trim to the installed position.
4. Install the trim cover J-hooks.
5. Install the electrical harness clip and the retainer on the adjuster bracket.
6. Connect the electrical harness to the seat motor harness.
7. Install the seat belt buckle. Refer to Seat Belt Buckle Replacement - Left Front in Seat Belts.
8. Install the seat belt bracket bolt (1). Tighten Tighten the bolt to 42 N.m (31 lb ft).
9. Install the seat trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) . IMPORTANT: Inspect the drive cables. Make sure they are straight between the motors and the drive screws.
10. Install the front seat. Refer to «SEAT REPLACEMENT - FRONT BUCKET»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the front seat track adjuster covers from the front seat adjusters by spreading the legs and pulling them off.
2. Remove the rear seat adjuster track cover retaining screw from the rear adjuster track cover manual seat.
3. Remove the track cover.
4. For the rear adjuster covers on the power seats, spread the legs of the covers, pull back and remove them from the vehicle.

Scheme 37

1. Position the rear seat track adjuster covers to the rear of the adjuster power seats. NOTE: 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.
2. Install the rear manual seat adjuster track cover retaining screw to the rear adjuster track cover manual seat. Tighten Tighten the screw to 2 N.m (18 lb in).
3. Install the front seat track adjuster cover to the front seat adjuster manual and the power seats.

1. Remove the front seat cushion outer trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the screws from the seat switch to the trim panel.
3. Disconnect the electrical connector from the power front seat switch.
4. Remove the power front seat switch from the vehicle.

Scheme 38

1. Connect the electrical connector to the power front seat switch. NOTE: 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.
2. Install the screws to the seat switch to the trim panel. Tighten Tighten the screws to 3 N.m (27 lb in).
3. Install the front seat cushion outer trim panel. Refer to «TRIM PANEL REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

Seat Adjuster Phase Adjustment - Power

1. Disable the SIR. Refer to «ZONE 5»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems__zone-5) in SIR.
2. Using the power seat switch, run the seat adjuster rearward until the drive bracket (3) and the anchor bracket (2) are together on either side of the adjuster.
3. Remove the drive cable (4) from the side of the adjuster which contains the brackets that touch.
4. Use the power seat switch to run the adjuster rearward until the other pair of brackets are together.
5. Install the removed drive cable. IMPORTANT: Inspect all 4 cables to verify that the cables are straight.
6. Test the adjuster for proper operation.
7. Enable the SIR. Refer to «ZONE 5»(/buick/century/vi-1997-2005/remont/airbag/#air-bag-restraint-systems) in SIR.

Seat Adjustment at Floorpan Attachment

1. The bolts that attach the seat adjusters to the floor pan allow a small amount of adjustment in the following directions: Fore and aft Side to side
2. The adjustment can be used for the following purposes: Alignment of the seat Alignment of the seat adjusters with each other
3. The adjustment can be used to help correct the following conditions: Hard or slow operation that is caused by misalignment of the adjusters Inability of the manually operated seat adjuster to lock.

1. Remove the front seat bolts.
2. Tip the seat forward and disconnect the electrical connector from the seat electrical harness.
3. Disengage the seat hook attachments from the floor pan.
4. Tip the seat rearward to expose the horizontal drive cables (4). IMPORTANT: The short cable is not replaceable.
5. Bend the long flexible cable at the center and pull the cable out of the motor (1) and the drive screw (3).
6. Remove the cable from the vehicle.

1. Insert the end of one cable (4) into the drive screw (3).
2. Bend the cable and insert the other end into the motor (1). IMPORTANT: Examine all 4 drive cables to ensure that the cables are straight.
3. Connect the electrical connector to the seat wire harness and test the seat for proper operation.
4. Examine the horizontal drive cables for synchronization. Refer to «SEAT ADJUSTER PHASE ADJUSTMENT - POWER»(/buick/century/vi-1997-2005/remont/seats/#seat-system__seat-adjuster-phase-adjustment-power) .
5. Tip the seat forward and engage the seat hook attachments to the floor pan. NOTE: 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.
6. Install the bolts that secure the adjuster to the floor pan. Tighten Tighten the bolts to 42 N.m (31 lb ft).

Scheme 39

1. Remove the front seat bolts.
2. Tip the seat forward and disconnect the electrical connector from the seat electrical harness.
3. Disengage the seat hook attachments from the floor pan.
4. Tip the seat forward to expose the vertical drive cables (3, 4).
5. To remove either cable perform the following procedure: Bend the flexible cable at the center. Pull the cable out of the motor (1 or 2) and the drive screw.

1. Insert the end of the replacement cable (3 or 4) into the drive screw.
2. Bend the cable and insert the other end into the motor.
3. If required, repeat the above procedure for the second drive cable. IMPORTANT: Examine all 4 drive cables to ensure that the cables are straight.
4. Connect the electrical connector to the seat wire harness and test the seat for proper operation.
5. Tip the seat forward and engage the seat hook attachments to the floor pan. NOTE: 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.
6. Install the bolts that secure the adjuster to the floor pan. Tighten Tighten the bolts to 42 N.m (31 lb ft).

1. Remove the center console switch assembly by pressing in the clips on each end and lifting the assembly out.
2. Disconnect the electrical connector from the appropriate heated seat switch: The natural connector from the driver switch The black connector from the passenger switch
3. Remove the heated seat switch from the switch assembly.

1. Install the heated seat switch in the switch assembly.
2. Connect the electrical connector to the appropriate heated seat switch: The natural connector to the driver switch The black connector to the passenger switch
3. Align the switch assembly to the console trim plate and snap the assembly into position to secure.

Seat Heater Element Replacement - Front

1. The seat heating element is sewn into the front seat back cover and the front seat cushion cover.
2. The seat heating element must be serviced as a unit. Refer to the flowing procedures for replacement: For the front seat back cover. Refer to «SEAT BACK COVER REPLACEMENT - FRONT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) . For the front seat cushion cover. Refer to «SEAT CUSHION COVER REPLACEMENT - FRONT (SPLIT BENCH)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT CUSHION COVER REPLACEMENT - FRONT (BUCKET SEAT)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Position the seat to the full-up position.
2. Remove the bolts that secure the front seat frame to the floor.
3. Rotate the seat forward to access the heater module.
4. Disconnect the seat electrical harness connector.
5. Pinch the retaining pin (2) together and pull the module (1) out from the seat inboard frame.
6. Disconnect the electrical harness connector (1) from the heater module (2).
7. Remove the heater module from the front seat.

1. Position the heater module to the front seat.
2. Connect the electrical harness connector (1) to the heater module (2).
3. Position the module (1) on the frame and push in to attach the retaining pin (2)
4. Lower the seat.
5. Connect the seat electrical harness connector. NOTE: 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.
6. Install the bolts that secure the front bucket seat adjuster to the floor pan. Tighten Tighten the bolts to 42 N.m (31 lb ft).
7. Reposition the front seat to the original position.

1. Raise the front seat head restraint to the full up position.
2. Insert a small diameter tool in the hole in both head restraint retainers and press in to release the rod.
3. Remove the front seat head restraint from the front seat.
4. Use the following procedure to remove the two support rods from the head restraint: Firmly grasp each rod and rotate it 90 degrees. Pull the rods out of the head restraint.

1. With the notches facing the front, push the support rods fully into the head restraint.
2. Align the head restraint to the head restraint retainers in the front seat back.
3. Install the head restraint to the front seat, pressing down until fully seated.
4. Raise the head restraint to the full up position to ensure the head restraint stops at the detent.
5. Reposition the head restraint to the original position.

1. Remove the head restraint from seat. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Position the front seat back to the full upright position.
3. Unhook the J-hook retainer at the bottom of the seat back cover.
4. Pull up on the front seat cover to enlarge the opening for access to the front seat frame. IMPORTANT: The use of a small flat-bladed tool as a lever under the top of the retainer will help in the removal of the head restraint retainer.
5. Reach carefully inside the front seat back between the seat back cover and the seat back pad and squeeze the bottom of the head restraint retainer together, while pulling the head restraint retainer upwards from the seat back frame with the other hand.
6. Remove the head restraint retainer from the front seat back frame.

1. Install the guide to the seat back frame, pressing in until fully seated into the front seat frame.
2. Reposition the front seat cover to the front seat back.
3. Close the J-hook retainer at the bottom edge of the front seat back cover.
4. Install the head restraint to the front seat. Refer to «HEAD RESTRAINT REPLACEMENT - FRONT SEAT»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
5. Return the front seat back to the original position.

Tools Required

J 38778 Door Trim Pad Clip Remover

Scheme 40

1. Using J 38778 remove the push-in retainers (1) from the front seat armrest base cover.
2. Remove the front seat armrest base cover from the armrest.
3. Using J 38778 remove the push-in retainers from the armrest bracket cover. IMPORTANT: Do NOT try to unscrew the caps from the armrest pivot bolts. The caps do not unscrew and can be damaged.
4. Position a flat-bladed tool behind the armrest bracket plastic cover and pry the cover off of the bracket.
5. From inside the cover, push out on the pivot bolt cap to disengage the cap from the cover.
6. Remove the pivot bolt cap.
7. Pivot the bracket cover forward and remove the rear bolts from the armrest base.
8. Pivot the bracket cover rearward and remove the front bolts from the armrest base.
9. Remove the armrest from the seat cushion frame.

Scheme 41

Scheme 42

1. Position the armrest base on the seat cushion frame. NOTE: 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.
2. Install rear bolts (1) the front seat armrest base. Tighten Tighten the bolts to 10 N.m (89 lb in).
3. Install the front bolts (1) to the armrest base. Tighten Tighten the bolts to 10 N.m (89 lb in).
4. Install the push-in retainers to the armrest bracket cover.
5. Center the pivot bolts in the bracket cover opening. IMPORTANT: The caps will NOT tighten but will continue to turn freely, even after the caps are secure.
6. Using a large coin, screw in the pivot bolt caps onto the cover.
7. Press in on the caps to seat them onto the pivot bolt heads.
8. Position the cover on the armrest base.
9. Install the push-in retainers.
10. Inspect the armrest for proper operation.

1. Open the armrest lid.
2. Rotate the cup holder to its open position.
3. Squeeze the mounting bracket of the cup holder assembly together to disengage the pins from the armrest storage box sides.
4. Remove the cup holder.

1. Position the cup holder in the armrest.
2. Squeeze the mounting bracket of the cup holder assembly and insert the pins into the mounting holes.
3. Rotate the cup holder to its closed position.
4. Close the armrest lid.

1. Use a flat-bladed tool in order to carefully release the retainer from the base of the recliner handle.
2. Remove the recliner handle.
3. Remove the finish panel screws.
4. Pull the finish panel away from the seat cushion frame in order to release the clips. Discard the clips.
5. Disconnect the power seat switch electrical connector, if equipped.
6. Remove the finish panel from the seat.

1. Install the finish panel to the seat.
2. Connect the power seat switch electrical connector, if equipped.
3. Use new clips in order to snap the finish panel to the seat cushion frame. NOTE: 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 finish panel screws. Tighten Tighten the screws to 3 N.m (27 lb in).
5. Install the retainer to the base of the recliner handle.
6. Install the recliner handle.

1. At each retainer location push rearward on the bottom of the seat cushion and then pull up.
2. Remove the rear seat cushion.

1. Align the seat belts to the notches in the rear seat cushion.
2. Position the rear seat cushion to the retainers.
3. Push down on the seat cushion above each retainer location.
4. Inspect the rear seat cushion to ensure that the retainers are properly engaged.

1. Remove the rear seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the hog rings from the rear seat cushion cover.
3. Reach inside of the rear seat cushion cover in order to unfasten the hook and the loop retainers securing the rear seat cushion cover to the pad.
4. Remove the rear seat cushion cover from the pad.

1. Position the rear seat cushion cover to the pad.
2. Align the alignment marks round on the rear seat cushion cover to the alignment marks slot on the pad.
3. Pull the rear seat cushion cover over the pad, alining the hook and the loop retainers.
4. Pull the rear seat cushion cover over the pad and pull over and under the sides.
5. Use firm hand pressure in order to fasten the hook and the loop retainers, securing the rear seat cushion cover to the pad.
6. Align the alignment marks on the rear seat cushion cover to the alignment marks on the pad, on the back side.
7. Install the hog rings to the rear seat cushion cover.
8. Install the rear seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Turn the seat cushion over.
3. Grasp the black retaining cup (1) and pull firmly in order to remove the seat cushion retainer.

1. Position the retaining cup (1) onto the wire frame (2) at the bottom of the seat cushion (3).
2. Press down on the retaining cup in order to secure the retainer to the wire frame.
3. Install the seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the rear seat back nuts from the child seat latch bracket.
3. Grasp the bottom of the rear seat back and lift upward to disengage offsets on the upper frame bar from the hangers.
4. Remove the rear seat back from the vehicle.

1. Position the rear seat back to the vehicle.
2. Hook the seat back upper frame to the hangers on the rear shelf. NOTE: 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.
3. Install the rear seat back nuts to the latch bracket. Tighten Tighten the nuts to 10 N.m (89 lb in).
4. Install the rear seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the rear center seat belts. Refer to Seat Belt Replacement - Center Rear in Seat Belts.
3. Remove the nut (1) from the child rear seat latch bracket.
4. Remove the bolts (2) from each end of the latch bracket.
5. Fold the rear seat back cushions down.
6. Remove the bolts from the rear seat latches.
7. Remove the rear seat latches from the rear seat back.
8. Fold the rear seat back cushions up.
9. Reposition the shoulder belts from the rear seat back.
10. Remove the rear seat back from the vehicle.

1. Position the rear seat back to the vehicle.
2. Reposition the seat belts to the rear seat back. NOTE: 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.
3. Apply a thread sealant, GM P/N USA 12345382 Canada 10953489, Loctite 242, Permatex 24200 to the threads of the bolts (2) and also the stud for the latch bracket nut.
4. Install the child seat latch bracket nut (1). Install the child seat latch bracket bolts (2) to each end of the latch bracket. Tighten Tighten the bolts and bracket nut to 42 N.m (31 lb ft).
5. Install the rear center seat belts. Refer to Seat Belt Replacement - Center Rear in Seat Belts.
6. Fold the rear seat back cushions down.
7. Install the rear seat latches to the rear seat back.
8. Install the bolts to the rear seat latches. Tighten Tighten the bolts to 10 N.m (89 lb in).
9. Fold the rear seat back cushions up.
10. Inspect the rear seat for proper operation.
11. Install the rear seat cushion. Refer to «SEAT CUSHION REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back. Refer to «SEAT BACK BOLSTER REPLACEMENT - REAR SPLIT FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the rear seat back pad. Refer to «SEAT BACK PAD REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK PAD REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the seat back pad frame.

1. Install the seat back frame.
2. Install the rear seat back pad. Refer to «SEAT BACK PAD REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK PAD REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Install the rear seat back. Refer to «SEAT BACK BOLSTER REPLACEMENT - REAR SPLIT FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the rear seat back bolsters. Refer to «SEAT BACK BOLSTER REPLACEMENT - REAR SPLIT FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the fold down pivot bolts (1) from the rear seat back frame.
4. Remove the fold down seat backs from the rear seat back frame.

Scheme 43

1. Position the fold down seat backs on the rear seat back frame. NOTE: 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.
2. Install the pivot bolts (1) to the seat back frame. Tighten Tighten the bolts to 10 N.m (89 lb in).
3. Install the rear seat back bolsters. Refer to «SEAT BACK BOLSTER REPLACEMENT - REAR SPLIT FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Install the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Pull back the trim on the right rear seat bolster in order to expose the rear compartment release handle cable, if equipped.
3. Reposition the rear compartment release handle cable from the right rear seat bolster, if equipped.
4. Pull back the rear seat bolster trim to expose the bolts to the rear seat frame.
5. Remove the bolts from the left and/or right rear seat bolster.
6. Remove the left and/or right rear seat bolster from the rear seat back frame.
7. Remove the push-in retainers from the center of the rear seat bolsters.
8. Remove the push-in tab from the end of the rear seat bolsters.
9. Remove the push-in J-hook retainers from the rear seat bolsters.
10. Remove the rear seat bolsters trim cover from the rear seat bolsters pads.

Scheme 44

1. Install the rear seat bolster trim cover to the rear seat bolster pads.
2. Install the push-in retainers to the center of the rear seat bolsters, pressing into place until fully seated.
3. Reposition the rear seat bolsters trim cover side flap under and over the seat back frame side rail. Reposition the rear compartment release handle cable to the right rear seat bolster, if equipped. NOTE: 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 bolts to the left and/or right rear seat bolster. Tighten Tighten the bolts to 6 N.m (53 lb in).
5. Install the push-in tab from the end of the rear seat bolsters, pressing into place until fully seated.
6. Install the push-in J-hook retainers to the rear seat bolsters, pressing into place until fully seated.
7. Install the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the rear seat back bolsters. Refer to «SEAT BACK BOLSTER REPLACEMENT - REAR SPLIT FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the bolts (1) from the seat back frame.
4. Remove the left rear seat back from the seat back frame.
5. Remove the right rear seat back from the seat back frame.
6. Unhook the J-hook retainers at the bottom of the rear seat back.
7. Lift up the seat back trim material in order to expose the hidden trim flaps, and remove the staples.
8. Reach inside of the rear seat back cover in order to unfasten the hook and loop retainers that secure the cover to the pad.
9. Remove the folding armrest, if equipped. Refer to «ARMREST REPLACEMENT - REAR SEAT (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «ARMREST REPLACEMENT - REAR SEAT (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
10. Remove the cover from the rear seat back by pulling the cover up and over the pad.

Scheme 45

1. Install the cover to the rear seat back by pulling the cover down and over the pad.
2. Reach inside of the right rear seat back cover and reposition the release pullstrap through the cover.
3. Use firm hand pressure in order to fasten the hook and the loop retainers, securing the rear seat back cover to the pad.
4. Install the folding armrest, if equipped. Refer to «ARMREST REPLACEMENT - REAR SEAT (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «ARMREST REPLACEMENT - REAR SEAT (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
5. Reposition the cable on the seat back.
6. Reposition the seat trim flaps.
7. Install new staples to the seat trim flaps.
8. Return the seat back trim material to the original position.
9. Fasten the J-hook retainer at the bottom of the seat back.
10. Install the left rear seat back to the seat back frame.
11. Install the right rear seat back to the seat back frame. NOTE: 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. Install the pivot bolts (1) to the seat back frame. Tighten Tighten the bolts to 10 N.m (89 lb in).
13. Install the rear seat back bolsters. Refer to «SEAT BACK BOLSTER REPLACEMENT - REAR SPLIT FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
14. Install the seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back cover. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Disconnect the rear seat back latch cable from the rear seat back latch.
3. Remove the rivets from the rear seat back latch.
4. Remove the rear seat back latch from the rear seat back frame.

1. Connect the rear seat back latch cable to the rear seat back latch.
2. Position the rear seat back latch to the rear seat back frame.
3. Install the rivets to the rear seat back latch.
4. Install the rear seat back cover. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the rear seat armrest, if equipped. Refer to «ARMREST REPLACEMENT - REAR SEAT (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «ARMREST REPLACEMENT - REAR SEAT (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the hog rings from the rear seat back cover.
4. Reach inside of the rear seat back cover in order to unfasten the hook and the loop retainers securing the rear seat back cover to the pad.
5. Remove the rear seat back cover from the pad.

1. Position the rear seat back cover to the pad.
2. Align the alignment marks on the rear seat back cover to the alignment marks on the pad.
3. Pull the rear seat back cover over the pad. Align the hook and the loop retainers.
4. Pull the rear seat back cover over the pad and pull over and under the edge.
5. Use firm hand pressure in order to fasten the hook and the loop retainers, securing the rear seat back cover to the pad.
6. Align the alignment marks on the rear seat back cover to the alignment marks on the pad, on the back side.
7. Install the hog rings to the rear seat back cover.
8. Install the rear seat armrest, if equipped. Refer to «ARMREST REPLACEMENT - REAR SEAT (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «ARMREST REPLACEMENT - REAR SEAT (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
9. Install the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the right and/or left rear seat back cover. Refer to «SEAT BACK COVER REPLACEMENT - REAR FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Remove the right and/or left rear seat back frame from the rear seat back pad.

1. Install the rear seat back frame to the rear seat back pad.
2. Reposition the rear seat back release cable pull strap to the right rear seat back pad.
3. Install the right and/or left rear seat back cover. Refer to «SEAT BACK COVER REPLACEMENT - REAR FOLDING»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
4. Install the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Remove the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the rear seat back cover from the rear seat back pad. Refer to «SEAT BACK COVER REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Separate the seat pad from the frame.
4. Remove the rear seat back pad.

1. Install the seat pad on the frame.
2. Install the rear seat back cover to the rear seat back pad. Refer to «SEAT BACK COVER REPLACEMENT - REAR»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
3. Install the rear seat back. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Fold down the rear seat back.
2. Unhook the seat trim J-hook retainers at the bottom of the rear seat back.
3. Pull back the seat trim to expose the rear seat armrest nuts.
4. Remove the nuts from the rear seat armrest.
5. Reposition the rear seat to the upright position.
6. Remove the rear seat armrest from the seat.

Scheme 46

1. Position the rear seat armrest to the rear seat back retainer slot.
2. Install the rear seat armrest, pressing into place until the armrest studs are fully seated through the seat back.
3. Fold down the rear seat back. NOTE: 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 rear seat armrest nuts. Tighten Tighten the nuts to 3 N.m (27 lb in).
5. Pull back the seat trim and refasten the J-hook retainers.
6. Reposition the rear seat to the upright position.

1. Remove the fixed seat back with armrest. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .
2. Remove the seat back armrest nuts.
3. Remove the seat back armrest from the seat back.

Scheme 47

1. Install the seat back armrest to the seat back. NOTE: 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.
2. Install the seat back armrest nuts. Tighten Tighten the seat back armrest nuts to 3 N.m (27 lb in).
3. Install the fixed seat back with armrest. Refer to «SEAT BACK REPLACEMENT - REAR (NON-FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) or «SEAT BACK REPLACEMENT - REAR (FOLDING)»(/buick/century/vi-1997-2005/remont/seats/#seat-system) .

1. Open the armrest lid.
2. Rotate the cup holder to its open position.
3. To release the cupholder assembly, use a twisting motion to slide the left side mounting pin rearward through the formed slot in the armrest wall.
4. Remove the cup holder.

1. Position the cup holder in the armrest.
2. Insert the right side pin into the hole in the storage box.
3. Slide the left side pin forward through the formed slot until positive engagement of the pin is felt.
4. Rotate the cup holder to its closed position.
5. Close the armrest lid.

1. Unlock the lock cylinder.
2. Fold the pass-through to the down position.
3. Remove the lock cylinder retainer clip.
4. Remove the lock cylinder from the pass-through panel.

1. Install the lock cylinder to the pass-through panel.
2. Install the lock cylinder retainer clip.
3. Fold the pass-through to the up position.
4. Lock the lock cylinder.

The power seat system consists of the following components

1. Driver seat adjuster motor assembly
2. Driver seat adjuster switch
3. Passenger seat adjuster motor assembly
4. Passenger seat adjuster switch
5. POWER SEATS 30A circuit breaker

Power Seat Operation

The seat adjuster motors are controlled by the seat adjuster switch. Battery positive voltage and ground is supplied to the seat adjuster motors through the seat adjuster switch. All of the seat adjuster switches are closed to ground when in an inactive state. When a seat adjuster switch is pressed one of the adjuster motor supply circuits is supplied battery positive voltage, and ground is provided through the supply circuit to the inactive switch. The adjuster motors are reversible and the direction of the adjuster motor rotation is determined by which of the supply circuits is closed to battery positive voltage and which remains grounded.

The heated seat system consists of the following components

1. Driver heated seat control module
2. Driver heated seat switch
3. Driver seat back heater element
4. Driver seat cushion heater element
5. Passenger heated seat control module
6. Passenger heated seat switch
7. Passenger seat back heater element
8. Passenger seat cushion heater element
9. LH HEATED SEAT 15A fuse
10. HVAC 10A fuse
11. RH HEATED SEAT 15A fuse

The heated seat control module controls the battery positive voltage used to supply the seat heater elements. Ignition voltage is supplied to the heated seat switch. When the heated seat switch is in the high or low position ignition voltage is supplied through the on switch signal circuit to the heated seat control module. Voltage to the high/low switch signal circuit is reduced by the resistors within the heated seat switch, high or low seat heater operation is determined by the voltage level to the heated seat control module. The heated seat control module uses the resistance through the heated seat thermistor to regulate the seat temperature. When the heated seat reaches the maximum temperature for high or low operating modes the battery positive voltage supply to the seat heater elements is removed. When the seat cools the resistance value through the heated seat thermistor returns to the limits set for high or low heated seat operation and the heated seat control module provides the battery positive voltage supply to the heated seat element supply circuit.

Scheme 48

See also:
• AIR BAG SAFETY PRECAUTIONS
• ZONE 7
• ZONE 7
• REMOVAL & INSTALLATION (SIDE IMPACT)
• ZONE 5
• SYMPTOMS - SEATS
• POWER SEATS SYSTEM DESCRIPTION AND OPERATION
• SEAT ADJUSTER PHASE ADJUSTMENT - POWER