GM has recently released a new refrigerant PAG (Polyalkylene Glycol) oil (Fig. 7) specifically engineered to service GM vehicles built with belt-driven air conditioning (A/C) compressors that use the environmentally-friendly alternative refrigerant R-1234yf.
Previously, there were multiple PAG oils released to service GM vehicles using R-1234yf (using belt-driven A/C compressors), which required technicians to refer to the Service Information during every A/C service to ensure the correct PAG oil was used.
With the universal PAG oil, the A/C repair process is simplified. Now, there are only two PAG oils needed (for R-1234yf systems and R-134a systems) when servicing GM cars built with belt-driven A/C compressors. (Fig. 8)
It is acceptable to use any existing inventory of the previously released R-1234yf PAG oils provided that it is the correct oil part number for the specific A/C system. If using a previously released, non-universal oil, always refer to Service Information to ensure the correct refrigerant oil is being used.
Oil Injection Tool
The new universal R-1234yf refrigerant PAG oil comes in the same 8 oz. (240 ml) tubes just as the previous refrigerant PAG oil. These cartridges are designed to be used with oil injection tool GE-45037. (Fig. 9)
High Voltage Electric A/C Compressors
For high voltage electric A/C compressors (Fig. 10), use only POE (Polyolester) refrigerant oil (GM PN 88862657, U.S., and 88862658, Canada). GM only has one POE oil released for service at this time.
Current Refrigerant Oils
– Thanks to Chris Semanisin