A/C Coupler O-ring: Service Precautions

Install new GM approved service replacement air conditioning (A/C) O-rings whenever a joint or a fitting is installed. The only exception is when the new replacement components provide the O-rings. Unless service replacement O-rings of the specified part numbers are used, excessive leakage of the Refrigerant-134a may occur. Refer to the part number for identification.

Important: Keep polyalkaline glycol (PAG) refrigerant oil off the fitting threads. Long term contact of the oil on the threads may cause future disassembly difficulties.