on 2000 Malibu it is between firewall and engine on passenger side about a foot down it is marked with an "L".
The schrader valve located within the low pressure side of the AC system.
Freon goes into the low pressure side of the air conditioning system. The attachment from the gauge used to put the freon in will only attach to the low pressure valve so it would be pretty hard to do it incorrectly.
The low pressure freon port is located on the low pressure line that is attach to the ac compressor (driver side). Safely jack up the car, look underneath at the compressor, then located the low pressure line (larger diameter). There you'll find the port underneath a cap.
R134a goes into the low pressure port
Always to the low pressure side. The low pressure side fitting is normally near the dryer ( large silver canister).
The Freon low pressure port is located on the passenger side of the engine near the back. It is made into an aluminum pipe connected to the ac hoses.
Low pressure port located on the larger hose from the compressor I think most trying to add know to use the low side but was looking for where it is located
2003 buick century were is the low side port for the freon enrty
The low pressure service valve is located in the line that runs from the compressor through the evaporator (fire wall) and up to the condenser on the low pressure (suction) side of the system. This will also be the larger diameter line.
If you are talking about the low pressure side recharge valve for the A/C system it is sort of low along side of the engine next to the radiator. It will be a fitting attached to a steel line that has a plastic cap on it that must be removed in order to put freon into the A/C system. It is called the low pressure side because it means it is on the suction side of the A/C compreesor (there fore low pressure) you never add freon to the high pressure (discharge side) of the system. This recharging is supposed to be done by service people with the correct knowledge and the equipment to prevent leakage of freon( one of the ozon depleating gases) to the atmosphere.
On the low pressure side. A charging hose will only fir on the low pressure side of the AC system.
The low pressure side is located on the compressor. To locate the port, jack up the driver side and crawl underneath to locate the compressor. Add the freon to the port on the compressor.