Where do you add freon in a 98 Oldsmobile cutless?

To add freon to a 1998 Oldsmobile Cutlass, locate the low-pressure service port on the air conditioning system. This port is typically found on the larger diameter aluminum line between the compressor and the evaporator. Remove the cap, attach the refrigerant can's hose to the port, and follow the instructions on the can to add freon while the AC is running. Always ensure you are using the correct type of refrigerant for your vehicle, which is R-134a for this model.