It should be on the line near the drier(large silver cylinder). On my 94 its back by the evaporator under the hood on the left side.. Its just behind the glove box under in the engine compartment.. That's the low pressure side.. Do not connect the hose from the R134 to the high pressure side,, It could blow up in your face..
Its on top of the a/c accumulator.................
The 1990 Buick LeSabre air conditioner recharge valve can be found on top of the air conditioning compressor. The air conditioner recharge valve will have a blue top.
This is not a job you can do at home so where the valve is doesn't matter. Take it to a shop.
The recharge valve for the air conditioner on a 2002 GMC Envoy can be found by looking at the rear of the engine compartment. It will have a cap over the valve labelled as low pressure side.
The air conditioning recharge valve on the 2003 Ford Explorer 4.6 is located on the low pressure side of the air conditioning system. Located on the line coming from the accumulator to the compressor is the recharge valve.
Against the firewall
The Freon recharge port can be found on the top of the air conditioner compressor. There will be two ports. The recharge port will be labeled as the low pressure port.
passanger side engine compartment might be on accumalator or line
On top of the accumulator/drier (It's the cylinder on the passenger side of the engine not too far from your heater fan) It has a plastic cap covering the valve.
The air conditioner on a 2004 Saturn Vue is recharged by locating the low pressure valve and connecting the refrigerant supply. It is then injected into the system until the desired pressure is reached.
There are ( 2 ) cylinder heads on your 4.0 liter over head valve V6 engine
The 2002 Dodge Grand Caravan air conditioning recharge valve is located on the air conditioning compressor. The recharge valve will be labeled as such.