Of you have the Duramax diesel you should be ok. I think its rated at 32,000 towing with the 10 speed.
Before I added a bunch of upgrades to my 2014 Chevy 2500 HD Duramax, I pulled my 2016 Voltage E-Series model 3605 which is around 13,000 lbs dry. Your truck has more HP than mine and should be fine. My RV tongue weight was very close to max weight for my truck.
445hp & 910 ft/lb torque, you can pull any 5th wheel rv I know of. sure a long wheelbase and maybe dually could handle better but you are fine, just don't get wild with it, lol. I would add air bags with independent air supply hoses to the rear and while pulling the rv run around 60# psi in the bags. with some of the highways being not the best I found the air bags smooth the ride out tremendously.
Ok… after reading the last 2 or 3 posts, I just gotta point out something.
Some excellent observations have been made, but the question is NOT about whether your truck can “pull” the rig. It ain’t about horsepower, and it ain’t about torque. Using Ford diesel Super Duty trucks as an example… the F-250, the F-350, and the F-450 of a certain model year ALL have the same engine. ANY of them will pull your rig just fine… no problem. They will all PULL your rig.
And while air bags on the axle will “soften” the ride comfort, they do very little (if anything) to aid the actual ability of the truck to handle high-profile, heavy towing loads.
And THAT’S the real issue… how your truck can HANDLE the load… especially on windy days, wet roads, and on steep downhill grades… and this is where the truck’s suspension, wheelbase length, axle ratios, and the question of dually rear wheels (or not) enters the equation. The various combinations of each of these options is REALLY what determines your truck’s GCWR, it’s towing capacity, and how suitable it is for your towing application.
Remember… we’re pulling toy haulers, not just simple RVs. They’re heavier than most other RVs, and then most of us put a toy or 2 in back of them, making them heavier still. And that extra “toy weight”, as I call it, is located BEHIND the rear axles… and that matters!
Take a hammer… put it on a table, and attach a string to the end of the handle with a loop knot. Now start pulling the hammer by the string around in circles on the table. As you circle faster & faster, notice how the heavy peens at the far end pull to the outside of the circle. This exactly how the laws of physics work on our toy haulers as you take curves on the highway.
Now consider that in most cases, your toy hauler weighs at least 1 ½ times what your truck does… most of the time, even more. Example:
A normal Ford F-250 medium or long bed truck weighs about 8,000 lbs.
My Voltage 3200 weighs right at it’s GVWR of 16,500 lbs when loaded. (the triple axle rig are much heavier).
In this case, my rig would weigh over TWICE the weight of the truck. That’s DOUBLE the mass. And, the only connection between the 2 is a single-point 5th wheel king pin, meaning that the rear of the RV is free to move with the forces of physics the same as the hammer on the table above.
Now let’s put you & your family in that truck, towing your rig, on a rainy day, in windy conditions. You’ve just crested the Monarch Pass in Colorado on US-50, and are now beginning a 16-mile long twisty, curvy, downhill journey… with the first 9 miles consisting of 6% grade with no less than 25-to-30 turns (some of them with a very tight radius). Adhering to the laws of physics, on each turn, your 16,000 lb. rig is trying to continue in a straight line… pushing the rear end of you much lighter 8,000 truck (hopefully not one with a short wheelbase) towards the outside of the turn. And the only thing keeping your truck stable are the 2 tire patches of your single-wheel rear axle trying to maintain traction on the wet pavement to keep you from getting pushed over the side of the mountain.
Now… still feel your truck is safe? Still feel your family will be safe? Only you can answer that question.
Posted below are the stats for that pass. I’ve crossed it many times over the years, and many others just like it. I answered that question the first time I towed my rig over a similar pass… and that was the last time I ever did it with the F-250 I used to have. The hundreds of other passes I’ve crossed in the 8 years of owning the rig have been in the F-450 I got less than 3 weeks after that first crossing.
