It is underneath the car. Right by where the oil filter is there is a little cap, and that is it.
Low pressure port.
Should be on the larger hose from the compressor
Well if it's the same as the 97 buick Skylark the blue or low pressureAC line is near the lower pressure hose coming off of the radiator... almost right next to it.
The low side AC port on a 1994 Buick Skylark is on the passenger side of the engine compartment. It is near the front of the oil pan.
low pressure side on a buick skylark with a 2.4 engine is by the compresor. you get to it from under the car. left side, front side of engine.
Refrigerant for a 1996 Buick Skylark is inserted into the low pressure AC hose. This hose is found on the left side of the engine bay.
The low pressure AC port on a 2000 Buick Century is located on the accumulator. It is used to fill the system with refrigerant and to check pressure levels.
The 1994 Buick Century air conditioning low side port can be found on top of the air conditioning compressor. The low side port will be labeled as the low pressure port.
They are usually on the drivers side, near the firewall, by the dryer. The dryer is that largish aluminum canister that is up front.
On my 99 Century 3.1l V6, the low pressure port is on the inverted "U" section of the low pressure line on the firewall near the EGR valve.
The ac recharge port is the low side port. It is on the hoses on the passenger side of the engine close to the belts.
You can add Freon to your 2001 Buick Century air conditioning system through the low pressure port. The low pressure port can be found on the top of the air conditioner compressor.