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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 55 (Heating, Ventilation, And Air Conditioning System) >> Repair Instructions >> Air Conditioning O-Ring Seal Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the new O-ring seal 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. IMPORTANT:

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

  5. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.
  6. IMPORTANT:

    DO NOT reuse O-ring seals.

  7. Carefully slide the new O-ring seal onto the A/C refrigerant component.
  8. GM662315Courtesy of GENERAL MOTORS COMPANY

    The O-ring seal must be fully seated.

  9. GM297225Courtesy of GENERAL MOTORS COMPANY

    Assemble the A/C components.

    Refer to the appropriate repair procedure.

    • For compression style fittings use a back up wrench on the fitting (2) and tighten the fitting nut (1) to specification.
    • For banjo style fittings install the bolt retaining the banjo type fitting and tighten to specification.