There was no 1997 Dodge Durango. They were'nt out until 1998. Hope this helps.
The recharge port is on the larger AC pipe
The low side service port to recharge the AC on a 1997 Olds Cutlass Supreme is at the rear of the engine. It is close to the firewall.
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.
On the side of the receiver dryer. You can find a diagram of this on the below link. Just follow the "Find your low side Port" icon.
It is under the dash on the left side
The small connector in the a/c line is the low port and the big connector is the high port side ...
The low side port, which is the smaller one.
The low side.
The recharge port is located on the passenger side near the firewall.
The 1994 Mercedes-Benz low side port can be found on the top of the air conditioner compressor. The low side port will be labeled as the low pressure port.
At the low side port. If you do not know what this is, take it to a shop.
I have a 2001, and the recharge port is on the passenger side, on the firewall. It's got a green cap on it and so far has been impossible to get to. Good luck.