GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure


    Object Number: 741190  Size: SH
  1. Disconnect the A/C low pressure switch electrical connector.
  2. Remove the A/C low pressure switch (2) from the accumulator (1).
  3. Remove and discard the O-ring seal from the A/C low pressure switch port on the accumulator.

Installation Procedure


    Object Number: 741190  Size: SH
  1. Install the new O-ring seal. Refer to O-Ring Replacement .
  2. 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 A/C low pressure switch (2) to the accumulator (1).
  4. Tighten
    Tighten the A/C low pressure switch to 4.8 N·m (42 lb in).

  5. Connect the A/C low pressure switch electrical connector.
  6. Leak test the fittings of the components using the J 39400-A .