Where is the low side port for recharging the AC on a 2000 Buick Century?

The low side port for recharging the AC on a 2000 Buick Century is located on the refrigerant line that runs from the evaporator to the compressor. Typically, it can be found near the firewall on the passenger side of the engine compartment. The port is usually capped with a plastic cover and is smaller in diameter compared to the high side port. Always ensure the engine is off and the system is depressurized before attempting to recharge the AC.