GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure


    Object Number: 1335111  Size: SH

    Note: There is no Schrader valve under the pressure sensor.

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove the front air deflector retainers.
  4. Remove the front air deflector.

  5. Object Number: 789018  Size: SH
  6. Disconnect the electrical connector (1) from the A/C refrigerant pressure sensor (2).
  7. Remove the A/C refrigerant pressure sensor.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 789018  Size: SH
  1. Install a new O-ring to the refrigerant pressure sensor. Refer to O-Ring Replacement.
  2. Install the A/C refrigerant pressure sensor (2).
  3. Tighten
    Tighten the sensor to 9.8 N·m (87 lb in).

  4. Connect the electrical connector (1) to the A/C refrigerant pressure sensor.

  5. Object Number: 1335111  Size: SH
  6. Install the front air deflector.
  7. Install the front air deflector retainers.
  8. Lower the vehicle.
  9. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
  10. Leak test the fittings of the component using J 39400-A .