But as far as towing how much can I tow up to?
Stay under 16.8k lbs of GVWR for your trailer, keeps the DOT off your ar$e....visually.
However, as GN trailers go, that weight range/axle configuration will be hard to come by with a large gap between 2x7k@14k versus duals 2x10k, 2x12k, or 3x7k triple axles.
1. A 16k lb GVWR gn will push your truck's limits with 3200lbs of trailer pin weight, which will exceed your truck's GVWR by 2k lbs. With air springs and 'E' tires, it's manageable. But, if you ARE ever actually weighed while loaded, and your rear axle weight exceeds the ratings on the Driver's door placard (which it will at that point)....you'll have some I$$ues.
2. Taking into account the trailerís empty weight, length and type of construction, a GN with 2-7k axles will only net you around 8k lbs (or less) of available cargo weight. Even if you could find a GN with twin 8k axles, youíre still severely limited on hauling capacity.
Thereís work out there in the 6-8k lb range, but youíll have more available work with a DRW setup, CDL, insurance, papers, numbers, permits, etc., which also increases your overhead.
2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"