Tony - Whichever one you get, MAKE SURE you know what it's actual towing capacity is for the EXACT version of the truck you intend to buy. Don't let the dealer tell you "Oh, any 1/2 ton pickup can tow that." That's the biggest lie in the industry, and he WILL use it on you.
For example, my 2009 Silverado Owners Manual lists towing capacities for 99 (count'em - NINTEY NINE!!) different permutations (cab, engine, rear end gearing, transmission, cooling packages, towing packages, long/short bed, etc.) of the Silverado 1500 ranging from 4,400 lbs to 13,000 lbs. (There are additional listings for the 2500 and 3500.) There's an 8,600 lb spread between 4,400 and 13,000 lbs!!! Mine is good for 7,500 lbs.
So make sure the exact vehicle you intend to purchase can handle your TT.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10