GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .
  2. Remove the left wiper arm linkage nuts.
  3. Reposition the left wiper arm linkage for access.

  4. Reposition the heater hoses for clearance.
  5. Disconnect the vacuum hose from the brake booster and reposition.

  6. Object Number: 628874  Size: SH
  7. Remove the evaporator outlet line to TXV nut.
  8. Disconnect the evaporator outlet and inlet line from the TXV.
  9. Disconnect the evaporator outlet line from the evaporator inlet line.
  10. Remove and discard the sealing washers.
  11. Important: Cap or tape the open A/C refrigerant lines immediately to prevent contamination of the refrigerant system.

  12. Cap off the refrigerant lines.

  13. Object Number: 652123  Size: SH
  14. Remove the TXV to evaporator bolts.
  15. Remove the TXV from the evaporator core.
  16. Remove and discard the sealing washers.

Installation Procedure

  1. Remove the cap or tape from the evaporator core.
  2. Using a lint-free clean, dry cloth, carefully clean the sealing surface of the evaporator core and the TXV.
  3. Important: Flat washer type seals do not require lubrication.

  4. Carefully slide the new sealing washers onto the evaporator core until seated.

  5. Object Number: 652123  Size: SH
  6. Install the TXV to the evaporator core.
  7. 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.

  8. Install the TXV to evaporator bolts.
  9. Tighten
    Tighten the bolts to 3.2 N·m (28 lb in).

  10. Remove the cap or tape from the A/C lines.
  11. Using a lint-free clean, dry cloth, carefully clean the sealing surface of the A/C lines and the TXV.
  12. Carefully slide the sealing washers onto the A/C lines until seated.
  13. Install the evaporator inlet line to the evaporator outlet line.
  14. Install the evaporator outlet and inlet lines to the TXV.

  15. Object Number: 628874  Size: SH
  16. Install the evaporator outlet line nut.
  17. Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  18. Reposition the heater hoses.
  19. Connect the vacuum hose to the brake booster.
  20. Install the left wiper arm linkage.
  21. Install the left wiper arm linkage nuts.
  22. Tighten
    Tighten the nuts to 5 N·m (44 lb in).

  23. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  24. Leak test the fittings of the component using J 39400-A .