GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Astro - 4WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Air Conditioning Accumulator Replacement

Removal Procedure
  1. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls.

    2. 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.

  2. Disconnect the negative battery cable.
  3. Discharge and recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging

    4. Object Number: 280394 Size: SH
  4. Remove the evaporator (1) from the accumulator.
  5. Remove the compressor and condenser hose assembly. Refer to Auxiliary Air Conditioning Compressor and Condenser Hose Replacement .
  6. Remove the O-ring seals.
  7. Disconnect the electrical connectors.
  8. Remove the pressure switch.
  9. Remove the mounting bracket bolt.

    10. Object Number: 281187 Size: SH
  10. Remove the mounting bracket.
  11. Remove the accumulator.
  12. Install sealing caps if you are not replacing the accumulator.

Installation Procedure

    Object Number: 280394 Size: SH
  1. Install the accumulator.

    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 the evaporator (1) to the accumulator.

    3. Tighten
    Tighten the evaporator to the accumulator to 48 N·m (35 lb ft).


    Object Number: 281187 Size: SH
  3. Install the mounting bracket bolt.
  4. Install the mounting bracket.
  5. Install the pressure switch.
  6. Connect the electrical connections.
  7. Coat the O-ring seals with 525 viscosity refrigerant oil.
  8. Install new O-ring seals.
  9. Install the compressor and condenser hose assembly. Refer to Auxiliary Air Conditioning Compressor and Condenser Hose Replacement .

    10. 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.

  10. Connect the negative battery cable.
  11. Evacuate and charge the system. Refer to Refrigerant Recovery and Recharging
  12. Ensure that no leaks exist in the system.
  13. Install the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls.