GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Engine 🢒 Engine Electrical 🢒 Drive Belt Idler Pulley Replacement

Removal Procedure

    Object Number: 391682 Size: SH
  1. Remove the upper radiator shroud from the radiator. Refer to Fan Shroud Replacement in Engine Cooling.
  2. Remove the drive belt from the drive pulleys. Refer to Drive Belt Replacement .
  3. Remove the a/c idler pulley bracket from the accessory bracket (non A/C only).

    4. Object Number: 188927 Size: SH
  4. Remove the drive belt idler pulley and bolt.

Installation Procedure

    Object Number: 188927 Size: SH
  1. Install the drive belt idler pulley to the mounting bracket.

    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.

  2. Install the drive belt idler pulley bolt.

    3. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).


    Object Number: 391682 Size: SH
  3. Install the A/C idler pulley to the A/C idler pulley bracket (non A/C only).

    4. Tighten
    Tighten the bolt to 83 N·m (61 lb ft).

  4. Install the drive belt on the drive pulleys. Refer to Drive Belt Replacement .
  5. Install the upper radiator shroud on the radiator. Refer to Fan Shroud Replacement in Engine Cooling.