I have a 2000 caravan with the 3.3 engine I had to put a new engine in it and while putting it in I broke a ac line I just left it cause I needed the car to run asap but I am replacing the alternater today so I figured while I am doing that its prolly a good time to replace that ac line but I am unsure which on it is can anybody help so I can make sure I order the right one autozone had no idea which one either and I just wanna order it once here are some pics

 

 

That is the liquid line and it appears you have rear a/c as well so it will come with the line that goes down the fire wall to the underbody lines. The other end of that line should run up the frame to the filter/drier. Should replace that too if the system has be open for an extended time.

 

Is that a dealer only part

 

I would assume it is, the line is available at multiple warehouses and runs around $200.00.