I have a 2017 2500HD with the 6.0, but mine is four wheel drive and has the 4:10’s back. I traded my half ton for it about a year ago.
Ive had around 8500 pounds behind it and it tows really really well. The 6.0’s are pretty much bullet proof and have been around quite a long time, I wanted a newer truck but didn’t want to gamble on the newer 6.6 gasser yet.
I get around 10-12 miles a gallon on average with my mixed highway and city driving. The personal best was 16 on a highway run. I recently did around a 225 mile round trip bringing my new trailer back that’s probably close to 3k empty and averaged almost 14, not to terrible imo. I pretty much ran 60-65 MPH on that deal.
For a 3/4 ton truck it rides better than other ones I’ve drove in the past, this is the first one I’ve personally owned before for what it’s worth. It’s not a turd power wise but obviously you won’t win any races against any diesels. Not sure how much or often you tow, for me it’s not a lot. But the truck is more than capable for my needs to pull the stuff I’ve got, helping buddy’s out or picking up a skid steer once in a while.