GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Grand Prix 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement

Removal Procedure
  1. Remove the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L or Air Cleaner Assembly Replacement in Engine Controls - 3.8L.

    2. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  2. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  3. Disconnect the electrical connector from the A/C refrigerant pressure sensor.

    4. Object Number: 282279 Size: SH
  4. Remove the refrigerant pressure sensor from the liquid line.

Installation Procedure
  1. Lubricate a new O-ring seal with mineral base 525 viscosity refrigerant oil.
  2. Install the new O-ring seal.

    3. Object Number: 282279 Size: SH

    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 refrigerant pressure sensor to the liquid line.

    4. Tighten
    Tighten the refrigerant pressure sensor to 4.7 N·m (41 lb in).

  4. Connect the electrical connector to the A/C refrigerant pressure sensor.
  5. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  6. Install the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.1L or Air Cleaner Assembly Replacement in Engine Controls - 3.8L.