GM Service Manual Online
For 1990-2009 cars only

Power Steering Pump Pulley Replacement L18 with C4500, C5500

Removal Procedure

  1. Remove the drive belt from the power steering pump pulley. Refer to Drive Belt Replacement .

  2. Object Number: 798058  Size: SH
  3. Remove the power steering pump pulley captive washer and retaining nut.
  4. Notice: Do not hammer the pulley off the shaft. The pulley or the pump may be damaged.

  5. Use a suitable puller in order to remove the pulley.

Installation Procedure


    Object Number: 798058  Size: SH
  1. Install the power steering pump 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 pulley captive washer and retaining nut.
  4. Tighten
    Tighten the pulley nut to 50 N·m (37 lb ft).

  5. Install the drive belt on the power steering pump pulley. Refer to Drive Belt Replacement .

Power Steering Pump Pulley Replacement LB7, LLY and LMM

Removal Procedure

  1. Remove the drive belt from the power steering pump pulley. Refer to Drive Belt Replacement for the 8.1L engine.

  2. Object Number: 798059  Size: SH
  3. Remove the power steering pump pulley captive washer and retaining nut.
  4. Caution: Do not hammer the pulley off the shaft. The pulley or the pump may be damaged.

  5. Use a suitable puller in order to remove the pulley.

Installation Procedure


    Object Number: 798059  Size: SH
  1. Install the power steering pump pulley.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the pulley captive washer and retaining nut.
  4. Tighten
    Tighten the pulley nut to 50 N·m (37 lb ft).

  5. Install the drive belt on the power steering pump pulley. Refer to Drive Belt Replacement for the 8.1L engine.

Power Steering Pump Pulley Replacement L18 with C6500, C7500, C8500

Removal Procedure

  1. Remove the drive belt from the power steering pump pulley. Refer to Drive Belt Replacement for the 8.1L engine.

  2. Object Number: 731690  Size: SH
  3. Remove the power steering pump pulley captive washer and retaining nut.
  4. Caution: Do not hammer the pulley off the shaft. The pulley or the pump may be damaged.

  5. Use a suitable puller in order to remove the pulley.

Installation Procedure


    Object Number: 731690  Size: SH
  1. Install the power steering pump pulley.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the pulley captive washer and retaining nut.
  4. Tighten
    Tighten the pulley nut to 50 N·m (37 lb ft).

  5. Install the drive belt on the power steering pump pulley. Refer to Drive Belt Replacement for the 8.1L engine.