I towed the Jayco in my signature (5000 lbs dry) with a 2007 1500 5.3 3.42 Silverado for the first season and hated it. When the TT and the TV were all loaded up with our gear and family of 4, it did ok on flat, open roads but when I got into the rolling hills of Missouri, that 5.3 and 4 speed struggled with that weight and the transmission was constantly shifting. I sold it for an older 2500 and haven't regretted it. The 6.0 is a wiser choice but you will definitely have to ensure the payload capacity is up to par with a 1500 6.0 Yukon. I'd hold out for a 2500 if you can...with a beefier frame and suspension you won't feel like the trailer is pushing you around.