Hi guys and thanks for looking. I have a 2003 grand caravan and the AC wasnt working, took it to the local repair shop and he said there are no problems. Only thing he said was that I needed to refill the system with freon and it would cost me $180. So my question is could I just refill it myself , what i mean is go to meijers and buy some freon?? Also he said he would add oil and freon and was curious if I could also add the oil myself. Could anyone tell me the proper pressure and the right freon to add , thanks again