GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Drive Belt Idler Pulley Replacement

Removal Procedure

    Object Number: 794629 Size: SH
  1. Remove the drive belt. Refer to Drive Belt Replacement .
  2. Remove the bolt from the right side idler pulley (ribbed pulley).
  3. Remove the idler pulley assembly.

    4. Object Number: 656135 Size: SH
  4. Remove the bolt for the center idler pulley (smooth pulley).
  5. Remove the idler pulley assembly.

    6. Object Number: 656138 Size: SH
  6. If equipped with dual generators, remove the bolt from the left side idler pulley (smooth pulley).
  7. Remove the idler pulley assembly.

Installation Procedure

    Object Number: 794629 Size: SH

    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 right side idler pulley assembly with the bolt.

    2. Tighten
    Tighten the idler pulley bolt to 43 N·m (32 lb ft).


    Object Number: 656135 Size: SH
  2. Install the center idler pulley assembly with the bolt.

    3. Tighten
    Tighten the idler pulley bolt to 43 N·m (32 lb ft).


    Object Number: 656138 Size: SH
  3. If equipped with dual generators, install the left side idler pulley assembly with the bolt.

    4. Tighten
    Tighten the idler pulley bolt to 43 N·m (32 lb ft).

  4. Install the drive belt. Refer to Drive Belt Replacement .