Opinions on the 2017 GMC Savana 2500

[Aesop]

...and when you constantly use all it has to give with a 6000 pound travel trailer behind it... that engine will GRENADE itself in short order.

Turbo gasoline engines are good for light loads and MPG. Not towing.

I encourage you to go hook 6K behind your turbo Ford and see if you really think it is made for that on a regular basis.
(It is not.)
Those numbers are more for a guy who tows his fishing boat to the local launch...or someone with a light trailer to go on vacation for a week or two...not constant hard use.

Those V6 turbos have a questionable lifespan without towing anything and a fair number of built-right-in problems Ford will likely manage like the previous (numerous) failures...(meaning they will ignore the issues for ten years or so.)
There is a reason why you will not find many in commercial use. They were tested and they failed. Quickly and rather spectacularly.
I advise you to keep trading in relatively new models if you wish to remain in love with the platform.
Trying to see trouble free 250K...especially towing the numbers you quoted...is little more than an unrealsitic dream.

Finally someone gets it. The V6 "EcoBoost" motors that Ford puts in their full size transit vans are not really built for towing.

I'm up here in Fairbanks, Alaska (Currently January 2023) and starting to see some of the newer awd Ford transit vans running around (in town and on Eilson Air Force Base)

and yeah there are a decent number of Quigley 4x4 converted Ford (older econoline) and chevy vans i see running around. However, you can't beat a v8!

 

[1zacster]

I have a '14 GMC Savana 2500 with the 4.8L and I love it. 10% weaker than the 5.3 but I can't say I miss the power unless it's a really steep hill. 6 speed transmission is great, newer engines are generally just going to be more reliable than older ones.
I agree with Almost There, 1 ton would be nicer since I do tow, but my situation was to pick a more reliable newer van than a riskier older one.