GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 818438  Size: SH
  1. Remove the seal washer from the A/C refrigerant component.
  2. Inspect the seal washer for any signs of damage.
  3. Inspect the A/C refrigerant components for damage or burrs. Repair if necessary.
  4. Important: DO NOT reuse sealing washer.

  5. Discard the sealing washer.

Installation Procedure

    Important: Flat washer type seals do not require lubrication.

  1. Inspect the new seal washer for any signs of cracks, cuts, or damage.
  2. Do not use a damaged seal washer.


    Object Number: 818438  Size: SH
  3. Using a lint-free clean, dry cloth, clean the sealing surfaces of the A/C refrigerant components.
  4. Carefully install the new seal washer onto the A/C refrigerant component.
  5. The washer must completely bottom against the surface of the fitting.
  6. Important: After tightening the A/C components, there should be a slight sealing washer gap of approximately 1.2 mm (3/64 in) between the A/C line and the A/C component.

  7. Assemble the remaining A/C refrigerant components. Refer to the appropriate repair procedure.