Well, you clearly joined the forum because of your A/C issue. I have a '14 and have 73k on my truck. I just had my condenser replaced last week. I was going to replace it myself but the only place I could find one was at a local dealer and for the condenser it was $325 and for two seals (which were over priced) was $400 out the door. My dealer said that GM was going to cover about 1k worth of the cost. So I paid $560 out of pocket. So I paid about $100 more than I would have if I fixed it myself.
Take it to GM and have them diagnose it and see what they will cover. They more than likely will not fight it because they know it is a huge issue. It sucks but at the end of the day, what can you do!?!?