GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

The A/C pressure sensor is located on the condenser end of the compressor hose. A Schrader valve is located in the A/C pressure sensor fitting.

Tools Required

J 34611-A A/C Valve Core Remover and Installer


    Object Number: 588312  Size: SH
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Disconnect the refrigerant pressure sensor electrical connector.

  3. Object Number: 588316  Size: SH
  4. Remove the refrigerant pressure sensor from the fitting.
  5. Remove and discard the O-ring.

  6. Object Number: 369066  Size: SH
  7. If necessary remove the service port valve core using J 34611-A .

Installation Procedure


    Object Number: 369066  Size: SH
  1. If removed, install the service port valve core using J 34611-A .

  2. Object Number: 588316  Size: SH
  3. Install a NEW O-ring seal in the refrigerant pressure sensor.
  4. Coat the O-ring seal with 525 viscosity refrigerant oil.

    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.

  5. Install the pressure sensor to the fitting.
  6. Tighten
    Tighten the sensor to 5 N·m (44 lb in).


    Object Number: 588312  Size: SH
  7. Connect the refrigerant pressure sensor electrical connector.
  8. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  9. Inspect the system operation.
  10. Perform the leak test. Refer to Leak Testing .