GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Century (China) (CNG) 🢒 Body and Accessories 🢒 Seats 🢒 Seat Adjuster Front Vertical Actuator and Rear Vertical Actuator Replacement

Removal Procedure
  1. Remove the drive cables. Refer to Seat Horizontal and Vertical Drive Cable Replacement .
  2. Manually adjust the adjuster in the full up position and in a horizontal position.
  3. Remove the screws from the upper channel and the vertical actuator from the upper channel.

Installation Procedure

    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.

  1. Install the vertical actuator to the upper channel. Secure with the screws.

    2. Tighten
    Tighten the vertical actuator screws to 6 N·m (53 lb in).

  2. Install the drive cables. Refer to Seat Horizontal and Vertical Drive Cable Replacement .
  3. Verify the adjusters are in phase. Refer to Front Seat Adjustment .