GM Service Manual Online
For 1990-2009 cars only

Adjustment Procedure

With the seat adjuster installed, chucking or jerking can be corrected by tightening or loosening the horizontal actuator and pinion gear to the adjuster lower track rack gear.

  1. Operate the seat to a 3/4-forward position.

  2. Object Number: 330847  Size: SH
  3. Loosen the bolt (1).
  4. Perform the following steps at the same time.
  5. 3.1. Use a large screwdriver in order to apply 67-111 N·m (15-25 lb ft) of outward pressure on the actuator (2).
    3.2. Use the horizontal adjuster switch to move the seat forward and backward.

    This will help position and secure the horizontal actuator pinion gear teeth to the lower track rack gear teeth, eliminating any free play.

    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.

    3.3. While keeping pressure on the actuator (2), tighten the bolt (1).

    Tighten
    Tighten the bolt to 28 N·m (20 lb ft).