GM Service Manual Online
For 1990-2009 cars only

Tools Required

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

Removal Procedure


    Object Number: 177123  Size: SH
  1. Remove the drive belt from the drive pulleys. Refer to Drive Belt Replacement .
  2. Remove the vacuum line from the vacuum pump.

  3. Object Number: 560503  Size: SH
  4. Remove the ground strap from the vacuum pump to the frame.

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

  8. Object Number: 177202  Size: SH
  9. Remove the vacuum pump pulley:
  10. 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
  11. Install the vacuum pump pulley on the vacuum pump.
  12. 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 .
  13. Remove the vacuum from the vise.

Installation Procedure


    Object Number: 177149  Size: SH
  1. Install the vacuum pump.

  2. Object Number: 560503  Size: SH
  3. Install the ground strap from the vacuum pump to the frame.
  4. 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.

  5. Install the mounting bolts.
  6. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 177123  Size: SH
  7. Install the vacuum line to the vacuum pump.
  8. Install the drive belt on the drive pulleys. Refer to Drive Belt Replacement .