GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 O-Ring Replacement

Removal Procedure
  1. Disassemble the A/C refrigerant components. Refer to the appropriate repair procedure.

    2. Object Number: 1252797 Size: SH
  2. Remove the O-ring seals from the A/C refrigerant component.
  3. Inspect the O-ring seals for signs of damage.
  4. Inspect the A/C refrigerant components for damage or burrs. Repair if necessary.

    5. Note: Cap or tape the open A/C refrigerant components immediately to prevent system contamination.

  5. Cap or tape the A/C refrigerant components.
  6. Discard the O-ring seals.

Installation Procedure
  1. Inspect the new O-ring seals for any sign or cracks, cuts, or damage. Replace if necessary.
  2. Remove the cap or tape from the A/C refrigerant components.
  3. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant components.

    4. Note: DO NOT allow any of the mineral base 525 viscosity refrigerant oil on the new O-ring seal to enter the refrigerant system.

  4. Lightly coat the new O-ring seals with mineral base 525 viscosity refrigerant oil.

    5. Object Number: 1252797 Size: SH

    Note:  DO NOT reuse O-ring seals.

  5. Carefully slide the new O-ring seals onto the A/C refrigerant component.
  6. The O-ring seals must be fully seated.
  7. Assemble the A/C components.

    8. Refer to the appropriate repair procedure.