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. Object Number: 153145  Size: SH
  3. Remove the evaporator tube extension block fitting bolt.

  4. Object Number: 153147  Size: SH
  5. Remove the LF floor air outlet duct.

  6. Object Number: 153150  Size: SH
  7. Remove the recirculation actuator solenoid screw.
  8. Remove the hot water bypass valve solenoid screw.
  9. Disconnect the solenoid electrical connectors.
  10. Position the solenoids out of the way.

  11. Object Number: 153151  Size: SH
  12. Remove the evaporator access panel screws.
  13. Remove the evaporator access panel.

  14. Object Number: 153164  Size: SH
  15. Remove the evaporator tube screw.
  16. Remove the evaporator tube.

  17. Object Number: 153180  Size: SH
  18. Remove the TXV screws.
  19. Remove the TXV.

Installation Procedure


    Object Number: 153169  Size: SH
  1. Install the TXV.
  2. • Use new O-rings.
    • Lubricate the new O-rings with mineral oil, 525 viscosity.

    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.

  3. Install the TXV screws.
  4. Tighten
    Tighten the screws to 8 N·m (71 lb in).


    Object Number: 153164  Size: SH
  5. Install the evaporator tube:
  6. • Use new O-rings.
    • Lubricate the new O-rings with mineral oil, 525 viscosity.
  7. Install the evaporator tube screw.
  8. Tighten
    Tighten the screw to 5 N·m (44 lb in).


    Object Number: 153151  Size: SH
  9. Install the evaporator access panel.
  10. Install the evaporator access panel screws.
  11. Tighten
    Tighten the screws to 1.5 N·m (13 lb in).

  12. Connect the solenoid electrical connectors.

  13. Object Number: 153150  Size: SH
  14. Position the heater water valve electric vacuum solenoid to the HVAC module.
  15. Install the heater water valve vacuum solenoid screw.
  16. Tighten
    Tighten the screws to 1.5 N·m (13 lb in).

  17. Position the recirculation actuator electric vacuum solenoid to the HVAC module.
  18. Install the recirculation actuator vacuum solenoid screw.
  19. Tighten
    Tighten the screws to 1.5 N·m (13 lb in).


    Object Number: 153147  Size: SH
  20. Install the LF floor air outlet.

  21. Object Number: 153145  Size: SH
  22. Install the evaporator tube extension block fitting bolt.
  23. Tighten
    Tighten the bolt to 20 N·m (15 lb ft).

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