GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

    • J 25034-C Pump Pulley Remover
    •  J 25033-C Pump Pulley Installer

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the drive belt. Refer to Drive Belt Replacement .
  3. Remove the vacuum line from the vacuum pump.

  4. Object Number: 177149  Size: SH
  5. Remove the vacuum pump mounting bolts.
  6. Remove the vacuum pump from the accessory bracket.

  7. Object Number: 177202  Size: SH
  8. Remove the vacuum pump pulley:
  9. 6.1. Place the vacuum pump in a vise.
    6.2. Attach the J 25034-C to the pulley.
    6.3. Remove the pulley from the vacuum pump using the J 25034-C .

    Object Number: 177205  Size: SH
  10. Install the vacuum pump pulley on the vacuum pump.
  11. 7.1. Attach the J 25033-C to the vacuum pump pulley.
    7.2. Install the vacuum pump pulley to the vacuum pump.
    7.3. Remove the J 25033-C .
  12. Remove the vacuum pump from the vise.

Installation Procedure


    Object Number: 177149  Size: SH
  1. Install the vacuum pump.
  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 mounting bolts.
  4. Tighten
    Tighten the bolts to 27 N·m (20 lb ft).


    Object Number: 177123  Size: SH
  5. Install the vacuum line to the vacuum pump.
  6. Install the drive belt. Refer to Drive Belt Replacement .
  7. Install the negative battery cable.