Where is the ac refill valve on a Pontiac Montana 2000?

On a 2000 Pontiac Montana, the AC refill valve is typically located on the low-pressure side of the AC system. You can find it near the accumulator, which is usually positioned near the front of the engine compartment, close to the passenger side. The valve is often covered with a plastic cap, and it may be labeled with an "L" for low pressure. Always ensure the engine is off and the AC system is properly diagnosed before attempting to refill.