The high side service port is located on the liquid line above the receiver/drier. The low side service port is located on the suction line at the top of the engine. Both the high side and low side A/C service port valve cores are serviceable.
Each of the service ports has a threaded plastic protective cap installed over it from the factory. After servicing the refrigerant system, always reinstall both of the service port caps.
An R-134a refrigerant recovery/recycling/charging station that meets SAE Standard J2210 must be used to recover the refrigerant from an R-134a refrigerant system. Refer to the operating instructions supplied by the equipment manufacturer for the proper care and use of this equipment.