One day last month, my wife pulled into the garage from running some errands in her 2016 Tahoe, and mentioned that the AC wasn't cooling. I shined a light through the grill, and could see the oil spot on the condenser where they all fail. The local Chevrolet dealer estimated that it would cost between $1500-1600 for the repair, and the GMC dealer wouldn't give me an estimate.
The Tahoe had the extended coverage on the condenser, but it expired in July. I called GM and they said I'd have to take it to a dealer to have it diagnosed before they could talk about giving me some help on the repair.
I decided to have an independent shop I trust do the repair, and it cost me $1013. It would have been nice to know beforehand what GM would have done for me on the repair, but I decided to go the independent shop route to avoid what might have turned into a prolonged ordeal.
I have the same condenser on my 2015 Sierra, and if (when) it fails, I think I'm going to attempt to replace it myself. I'm fairly comfortable with replacing the condenser, but not so much with charging the system. I've watched quite a few videos, but still have a a few questions. But I'm also not comfortable paying another grand for the repair, so it might be time to learn.