So, changed my water pump the other day in my 2004 GC 4.7 l and its working great (after considerable effort and determination). But in an effort to obtain more space, my old man loosened the Ac line and all the refrigerant??? came out. I havent been turning on my ac at all bc of this. So, Do i need to take it to a pro, or can I buy a kit and recharge myself? Thoughts?