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. Remove the nut from the TXV mounting stud.

  3. Object Number: 872539  Size: SH
  4. Remove the evaporator tube and the compressor suction hose from the TXV.
  5. Remove and discard the seal washers.

  6. Object Number: 872568  Size: SH
  7. Remove the TXV bolts.
  8. Remove the TXV.
  9. Remove and discard the seal washers.

Installation Procedure


    Object Number: 872568  Size: SH
  1. Install new seal washers to the evaporator core fittings. Refer to Sealing Washer Replacement .
  2. Install the TXV.
  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 TXV bolts.
  5. Tighten
    Tighten the bolts to 7 N·m (62 lb in).


    Object Number: 872539  Size: SH
  6. Install new sealing washers on the evaporator tube and the compressor suction hose fittings. Refer to Sealing Washer Replacement .
  7. Install the evaporator tube and the compressor suction hose to the TXV.
  8. Install the TXV nut.
  9. Tighten
    Tighten the nut to 20 N·m (15 lb ft).

  10. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging .
  11. Leak test the fittings using the J 39400-A .