GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

    • J 9553-01 O-Ring Remover
    • J 5403 Snap Ring Pliers

    Object Number: 258039  Size: SH
  1. Recover the refrigerant.
  2. Disconnect the electrical connector from the switch (4) in the rear head of the compressor.
  3. Remove the switch retaining ring using the J 5403 .
  4. Remove the switch (4) from the compressor.
  5. Remove the old O-ring seal from the switch cavity using the J 9553-01 .

Installation Procedure

Tools Required

J 5403 Snap Ring Pliers


    Object Number: 258039  Size: SH
  1. If you are reinstalling an existing control switch in the compressor, use a new O-ring and a new retainer ring. An O-ring and a retainer ring is included in a new switch kit.
  2. Inspect the switch cavity and the O-ring groove in the rear head for dirt or for foreign material.
  3. Clean the components as necessary.

  4. Lubricate the new O-ring using clean refrigerant oil.
  5. Install the new O-ring into the groove in the switch cavity.
  6. Lubricate the control switch housing using clean refrigerant oil.
  7. Install the switch (4) into the switch cavity until the switch bottoms out in the cavity.
  8. Using the J 5403 , install the switch retaining ring.
  9. Ensure that the high point of the curved sides is adjacent to the switch housing.

  10. Ensure that the retaining ring is properly seated in the switch cavity retaining groove.
  11. Leak test according to the bench test procedure.