GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Montana 🢒 Engine 🢒 Engine Mechanical - 3.4L 🢒 Air Conditioning Compressor Replacement

Removal Procedure
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the engine mount strut bracket left side. Refer to Engine Mount Strut Bracket Replacement in Engine Mechanical.
  3. Remove the electric cooling fan. Refer to Engine Cooling Fan Replacement in Engine Cooling.
  4. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical.

    5. Object Number: 392590 Size: SH
  5. Disconnect the electrical connector at the compressor.

    6. Object Number: 299178 Size: SH
  6. Remove the compressor hose assembly at the compressor.

    7. Object Number: 277918 Size: SH
  7. Remove one lower mounting bolt.
  8. Remove two upper mounting bolts.
  9. Remove the compressor.

Installation Procedure

    Object Number: 277918 Size: SH
  1. Install the compressor.

    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 two upper mounting bolts.

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

  3. Install one lower mounting bolt.

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


    Object Number: 392626 Size: SH
  4. Use the new sealing washers(1) in order to install the compressor hose assembly to the compressor.

    5. Tighten
    Tighten the nut to 33 N·m (24 lb ft).


    Object Number: 392590 Size: SH
  5. Connect the electrical connector to the compressor.
  6. Install the electric cooling fan. Refer to Engine Cooling Fan Replacement in Engine Cooling.
  7. Install the engine mount strut bracket left side. Refer to Engine Mount Strut Bracket Replacement in Engine Mechanical.
  8. Remove the drive belt. Refer to Drive Belt Replacement in Engine Mechanical.
  9. Evacuate and charge the system. Refer to Refrigerant Recovery and Recharging .
  10. Leak test the A/C system. Refer to Leak Testing .