2014 CTD 3500. I live in the sticks and drive 10 miles for anything and then snowbird for 7 months. If I was still working and starting it twice a day to go 6 miles to work in the winter I wouldn't buy one. Or then had to go out a few hours after getting home from work to drive 1/4 mile to the store isn't what I would put a diesel through. When working I had a Silverado 4.3 gasser that was warmed up by the time I got to work.
I dont know how far back it goes but my sons 2012 CTD require a 67,500, 125,000 mile egr cooling system cleaning and crankcase filter replacement. Sons 2012 was always sooted up and popping codes. Dealer tech said dont idle it and take it out and run it in 5th for as far as reasonably possible at high speed.
Another son has a 2013 2500 DEF lives in Colorado and daily drives but also keeps it on the cord all winter.
My 2014 def doesn't give that maintenance procedure at 75,000 and has never had any problems. I did the egr cooler and egr valve maintenance for my son. I understand it's about a $1,200 service?? I'll be doing his again at 150,000 along with a valve adjustment. I joke with him that he wasn't working it hard enough but now he moved up to a 35 ft FW and runs it in 5th to keep it "On the pipe". I often run mine in 5th unloaded to keep it percolatin. It's a truck engine not a car.
Cooler coming off

EGR cooler full of solvent. Ends capped

EGR Valve

I also addressed some corrosion at the turbo housing inlet to hose connection. Iirc the CC filter, cooler plugs, gaskets were $165
