Where is the low pressure AC service port on a 1993 Buick Skylark?

On a 1993 Buick Skylark, the low-pressure AC service port is typically located on the larger diameter aluminum refrigerant line, which runs from the evaporator to the compressor. You can find it near the front of the engine compartment, often close to the firewall. The port is usually capped with a plastic or metal cap, which may be marked with "L" for low pressure. Always ensure the engine is off and the AC system is not pressurized before attempting to access the port.