GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 TrailBlazer - 4WD 🢒 Engine 🢒 Engine Controls and Fuel - 4.2L 🢒 Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the electrical connector from the A/C refrigerant pressure sensor. The connector is accessible through the lower control arm.

    3. Object Number: 1864508 Size: SH
  3. Remove the A/C refrigerant pressure sensor from the compressor hose block (1).
  4. Remove and discard the O-ring seal from the A/C refrigerant pressure sensor.

Installation Procedure
  1. Install the new O-ring seal. Refer to O-Ring Replacement .

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1864508 Size: SH
  2. Install the A/C refrigerant pressure sensor to the compressor hose block (1).

    3. Tighten
    Tighten the A/C refrigerant pressure sensor to 4.8 N·m (42 lb in).

  3. Connect the electrical connector to the A/C refrigerant pressure sensor.
  4. Leak test the fittings of the component using J 39400-A .
  5. Lower the vehicle.