GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Disconnect the electrical connector from the A/C pressure switch.
  3. Remove the A/C low pressure switch.

  4. Object Number: 735909  Size: SH
  5. Remove the nut (3) retaining the accumulator (4) to evaporator (1).
  6. Remove the compressor suction hose assembly from the accumulator.
  7. Remove and discard the O-ring seals .
  8. Remove the accumulator clamp nut.
  9. Remove the accumulator from the vehicle.

Installation Procedure

    Important: If replacing the accumulator, add the refrigerant oil to the accumulator. Refer to Refrigerant System Capacities for the capacity information.

  1. Install the accumulator to the vehicle.
  2. Install the accumulator into the accumulator clamp.
  3. 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.

  4. Install the accumulator clamp nut.
  5. Tighten
    Tighten the nut to 10 N·m (88 lb in).

  6. Install the A/C low pressure switch.
  7. Tighten
    Tighten the A/C low pressure switch to 5 N·m (44 lb in).


    Object Number: 735909  Size: SH
  8. Install new O-ring seals. Refer to O-Ring Replacement .
  9. Install the accumulator to the evaporator.
  10. Install the accumulator retaining nut.
  11. Tighten
    Tighten the nut to 28 N·m (21 lb ft).

  12. Connect the compressor suction hose to the accumulator (4).
  13. Install the suction hose nut.
  14. Tighten
    Tighten the nut to 48 N·m (35 lb ft).

  15. Connect the electrical connector to the A/C low pressure switch.
  16. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  17. Leak test the fitting of the component using the J 39400-A .