Where is the low side valve on a 1997 Pontiac air conditioning?

On a 1997 Pontiac, the low side valve for the air conditioning system is typically located on the larger diameter aluminum line that runs from the evaporator to the compressor. It is often found near the accumulator or receiver-drier, usually on the passenger side of the engine bay. To identify it, look for a valve that allows you to connect a pressure gauge or recharge the system.