Which valve do you use to add freon to AC in a 2005 Chevy Equinox video?

To add Freon to the AC system of a 2005 Chevy Equinox, locate the low-pressure service port, which is typically on the larger diameter line between the AC compressor and the evaporator. This port is usually marked with a blue or black cap. Make sure to use the correct refrigerant type and follow safety precautions when adding Freon. Always check the system pressure before adding refrigerant to avoid overcharging.