GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Corvette 🢒 Engine 🢒 Engine Mechanical - 5.7L 🢒 Drive Belt Idler Pulley Replacement

Drive Belt Idler Pulley Replacement Air Conditioning

Removal Procedure

    Object Number: 74089 Size: SH
  1. Remove the accessory drive belt (5). Refer to Drive Belt Replacement .
  2. Remove the air conditioning drive belt (1). Refer to Drive Belt Replacement .

    3. Object Number: 289960 Size: SH
  3. Remove the air conditioning belt idler pulley bolt.
  4. Remove the air conditioning belt idler pulley.

Installation Procedure

    Object Number: 289960 Size: SH
  1. Install the idler.

    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 idler pulley bolt.

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


    Object Number: 74089 Size: SH
  3. Install the air conditioning drive belt (1). Refer to Drive Belt Replacement .
  4. Install the accessory drive belt (5). Refer to Drive Belt Replacement .

Drive Belt Idler Pulley Replacement Accessory

Removal Procedure

    Object Number: 393975 Size: SH
  1. Remove the accessory drive belt. Refer to Drive Belt Replacement .

    2. Object Number: 393856 Size: SH
  2. Remove the accessory drive belt idler pulley bolt.
  3. Remove the accessory drive belt idler pulley.

Installation Procedure

    Object Number: 393856 Size: SH
  1. Install the accessory 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.

  2. Install the accessory drive belt idler pulley bolt.

    3. Tighten
    Tighten the accessory drive belt idler pulley bolt to 50 N·m (37 lb ft).


    Object Number: 393975 Size: SH
  3. Install the accessory drive belt. Refer to Drive Belt Replacement .