I'm in the same boat with the faulty AC condenser. After 4 attempts to fix it at my dealer, I finally called GM to complain and they gave me the same BS answer of no ETA on the re-designed condenser. I'm sick of this being the 5th time getting fixed (and that's if it really gets fixed this time).
This is my first new American vehicle purchase and I can say with confidence I will never buy American again. I know that might piss some off but I've owned Nissan, Honda, Suzuki, and Toyota and have never had a major issue with any of them. With a $50K+ purchase (more than any new vehicle I've ever bought), I expect it to work.
I went to CarMax yesterday to see what they'd give me for my 2016 SLT Crew Cab with only 2,800 miles on it (mint condition). I told them the AC doesn't work and they didn't care as long as it's under warranty. They only offered me $41,000 for it. While they were evaluating my truck, I test drove a 2016 Nissan Titan XD Diesel. It was very nice and if they offered me $43-44K, I would have immediately traded it in for the Titan. The pathetic part is I can't even do a private sale of my truck until the AC is fixed which from what others are reporting could be 2+ months.
I'll probably wait for the fixed AC and then immediately sell it and buy a used Titan.