He said they've had numerous problems with the diesel, but the newest version was better. some of it depends on how you use it, short trips are murder on the exhaust filters, you will have problems with that. as to the other problems we didn't get into that, when I started to say the diesel he cut me off and said no.
I wanted the V8 because I like them and they're not long for this world. and it does a lot of short trips so that was an issue. as far as fuel economy it's averaging 17 so far so I'm fine with that.
I have a lot of experience with diesel pickups and you can pretty much rest assured you're not going to save any money with them long term. my advice would be to dump it before the warranty is up, this engine might be an exception time will tell. but history says the maintenance will offset anything you save on fuel. and if this engine proves to be a dog like most GM diesels you're going to get hosed on resale. I'm in farm and ranch country, we all drive 1 ton diesels, it's 95% Ford and Ram with GM being a distant 3rd. they're just not players in the market.