Where is AC Low pressure port located on Dodge Durango 2004 4.7 liter ?

The AC  refrigerant has to be recharged from low pressure port.There are actually two port.One is low pressure port and other is high pressure port.

The high side service port (5) is located on the liquid line (3) above the receiver/drier (2). The low side service port (6) is located on the suction line (9) at the top of the engine. Both the high side and low side A/C service port valve cores are serviceable. See the diagram below for exact port.

 The part number 6 is low pressure port and part number 5 is high pressure port.

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