GM Service Manual Online
For 1990-2009 cars only

Drive Belt Idler Pulley Replacement Upper

Removal Procedure


    Object Number: 327021  Size: SH
  1. Remove the supercharger drive belt. Refer to Drive Belt Replacement .

  2. Object Number: 370453  Size: SH
  3. Remove the idler pulley bolt.
  4. Remove the drive belt idler pulley.

Installation Procedure


    Object Number: 370453  Size: SH
  1. Install the drive belt idler pulley.
  2. 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. Install the idler pulley bolt.
  4. Tighten
    Tighten the idler pulley bolt to 50 N·m (37 lb ft).


    Object Number: 327021  Size: SH
  5. Install the supercharger drive belt. Refer to Drive Belt Replacement .

Drive Belt Idler Pulley Replacement Lower

Removal Procedure


    Object Number: 327021  Size: SH
  1. Remove the supercharger drive belt. Refer to Drive Belt Replacement .

  2. Object Number: 327164  Size: SH
  3. Remove the idler pulley bolt.
  4. Remove the drive belt idler pulley.

Installation Procedure


    Object Number: 327164  Size: SH
  1. Install the drive belt idler pulley.
  2. 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. Install the idler pulley bolt.
  4. Tighten
    Tighten the idler pulley bolt to 50 N·m (37 lb ft).


    Object Number: 327021  Size: SH
  5. Install the supercharger drive belt. Refer to Drive Belt Replacement .