GM Service Manual Online
For 1990-2009 cars only

Special Tools

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 coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement.

  3. Object Number: 924798  Size: SH
  4. Disconnect the low pressure sensor electrical connector (2).

  5. Object Number: 1190441  Size: SH
  6. Disconnect the blower motor assembly electrical connector.

  7. Object Number: 1190432  Size: SH
  8. Disconnect the blower motor resistor assembly electrical connector.

  9. Object Number: 1190579  Size: SH
  10. Remove the retaining nut (1) from the evaporator inlet tube.
  11. Remove the evaporator inlet tube retaining screw.
  12. Remove the evaporator inlet tube from the evaporator.
  13. Remove the O-ring seal.

  14. Object Number: 924801  Size: SH
  15. Remove the retaining nut (1) from the accumulator.
  16. Remove the accumulator from the evaporator.
  17. Remove the O-ring seal.

  18. Object Number: 1190546  Size: SH
  19. Remove the blower module assembly screws.
  20. Remove the blower module assembly.
  21. Remove the evaporator core from the evaporator and blower module assembly.

Installation Procedure

  1. If replacing the evaporator core, add the specified amount of PAG oil directly into the evaporator. Refer to Refrigerant System Capacities.

  2. Object Number: 1190572  Size: SH
  3. Install the evaporator.

  4. Object Number: 1190546  Size: SH
  5. Install the evaporator and blower module assembly.
  6. Install the evaporator and blower module assembly retaining screws.
  7. Install new O-ring seals. Refer to O-Ring Replacement.

  8. Object Number: 924801  Size: SH
  9. Install the accumulator to the evaporator.
  10. Caution: Refer to Fastener Caution in the Preface section.

  11. Install the accumulator retaining nut (1) and tighten to 18 N·m (13 lb ft).
  12. Install the evaporator inlet tube to the evaporator.

  13. Object Number: 1190579  Size: SH
  14. Install the evaporator inlet tube retaining nut (1) and tighten to 16 N·m (12 lb ft).
  15. Install the evaporator inlet tube retaining screw.

  16. Object Number: 1190432  Size: SH
  17. Connect the blower motor resistor assembly electrical connector.

  18. Object Number: 1190441  Size: SH
  19. Connect the blower motor assembly electrical connector.

  20. Object Number: 924798  Size: SH
  21. Connect the low pressure sensor electrical connector (2).
  22. Install the coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement.
  23. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
  24. Leak test the fittings of the components using the J 39400-A .