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Delete is simply people talking about removing emissions components. Illegal, but so is driving over the speed limit. The tunes are different levels of power.. stage 1 is generally a lower power over stock that people use for towing/etc.
A few articles around that one:
https://www.ecodieselram.com/forum/threads/hi-everyone-i-am-new-to-the-forum-i-own-a-2015-eco-diesel.6324/#post-43091
https://www.ecodieselram.com/forum/threads/p20ee-code.4653/
Off the top of my head, I know rough country makes one. No experience with it however...
https://www.roughcountry.com/dodge-ram-rear-led-bumper-10775.html?find=2017-ram-1500-4wd-755136
Hey Chris, a bit late on the reply here.. but likely you need to see a dealer to put the truck in regen mode and burn it off.
Otherwise, here is a thread: https://www.ecodieselram.com/forum/threads/exhaust-filter-full.4723/
That's the case with most dealers and Niche cars/trucks.. You could say the same about the F150 Diesel.. NOBODY, I mean nobody knew they even made one outside of your car enthusiast that tracked diesels and trucks in general.