We actually bought out TV before we bought the trailer, and had an eye on getting one of the GM going out of business deals. We looked at Chevy's but couldn't find a single vehicle with the minimum creature comfort and safety standards. My wife had her eye on a Caddy that included the blow air up your butt seats (a real nice thing to have in humid climates and long drives). So we settled on an Escalade EXT. Similar to the Avalanche but with more standard features and more power. Not much to add to it. It has more than ample HP @400 and a 6.2L engine with heavy duty alternator and transmission cooler, with 6 speed tranny and Tow Haul mode. Never had an issue with hills or overheating whatsoever (Appalachian mtns that is.)
While the carrying capacity is limited, we watch what we load and its just the two of us and a small dog. It has the advantage of having several lockable compartments (saddle bags) for this and that, as well as a sturdy tonneau cover. We really appreciate having a place to carry and store dirty and smelly stuff like generators and camp stoves and grills as well. I have plans to add a couple of 250w solar panels to the tonneau cover at some point, to act as additional battery boost when we need it.
Something we didn't consider was the AWD and the Auto leveling which both came with this truck. Nice to have the former and while some consider the latter a liability, we utilize a weight distributing hitch and the auto leveler is OK as long as you set it up right to begin with.
But let me tell you that your time actually spent trailering is most likely meager compared to the time you spend in your TV not trailering, so get something you really like as a driver.
We Love the AWD for driving to and ON the beach. Easy setup when all you have to do is open the tailgate. The Caddy drives like it is on rails with 22inch rims... More stability trailering too. And then there are the blow air up your butt seats....
But nowadays, you can get a similarly equipped Silverado for not too much more than the deal we got (about 50K new) and I'd probably go that route. Its a lot to spend on the TV, but what we saved getting the smaller trailer makes up for it and as I said before, you'll spend more time in the truck than you will trailering if you are like most folks.
A word of caution though, while most folks do their own research, there are many opinions here so I won't begin to tell you what's right for you. There's plenty of others that will. LOL!