GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Chevy P12 Chassis 🢒 Engine 🢒 Engine Cooling 🢒 Air Conditioning Compressor Replacement

Removal Procedure

    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. Discharge and recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging in this section.
  3. Remove the drive belt. Refer to Drive Belt Replacement .
  4. Remove the electrical connectors from the A/C compressor.

    5. Object Number: 260961 Size: SH

    Important: When removing the sealing washers, prevent dirt and foreign material from getting on the following sealing surfaces:

       • The washers
       • The block fitting
       • The A/C compressor ports
    Use a lint-free cloth in order to clean all of the sealing surfaces.

  5. Remove the A/C compressor hose bolt and clamp.
  6. Remove and discard the A/C compressor sealing washers.
  7. Remove the bolts and the compressor from the bracket.

Installation Procedure
  1. Fill the A/C compressor. If the A/C compressor is being replaced, refer to Refrigerant Oil Distribution Specifications in this section.

    2. Object Number: 260961 Size: SH

    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 compressor and bolts to the bracket.

    3. Tighten
    Tighten the A/C compressor bracket bolts to 50 N·m (37 lb ft).

    Important: When installing the sealing washers, prevent dirt and foreign material from getting onto the sealed surfaces of the following components:

       • The washers
       • The block fitting
       • The A/C compressor ports
    Clean all of the sealing surfaces with a lint-free cloth.

    Do not oil the sealing washers prior to assembly.

    Do not reuse the sealing washers.

  3. Install the new sealing washers onto the pilots of the hose fitting. Ensure that the washers bottom against the surface of the hose fitting.
  4. Install the refrigerant hoses on the A/C compressor.

    5. 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. Secure the refrigerant hoses with the A/C compressor hose clamp bolt.

    6. Tighten
    Tighten the A/C compressor hose clamp bolt to 35 N·m (26 lb ft).

  6. Install the electrical connectors to the A/C compressor.
  7. Install the drive belt. Refer to Drive Belt Replacement .
  8. Connect the negative battery cables.
  9. Add refrigerant to the system. Refer to Refrigerant Recovery and Recharging in this section.
  10. Inspect the system for leaks. Refer to Leak Testing .