How do you add freon to gmc safari?

To add Freon to a GMC Safari, first ensure the engine is running and the air conditioning is set to the maximum cool setting. Locate the low-pressure service port, typically found on the larger diameter aluminum line between the compressor and the evaporator. Attach the refrigerant can to the service port, following the manufacturer's instructions, and slowly add Freon while monitoring the gauge until the system reaches the proper pressure. Always check for leaks and consider consulting a professional if you're unsure about the process.