Most RELIABLE Diesel 1 Ton Truck???

5.9 Cummings with a six speed.

I don't think he is going to find one that is under 50k miles, and only a couple years old...that is what he is requesting.

The big 3 all build good trucks, it all boils down to personal preference and how well the vehicle has been maintained. Try to find one that was privately owned for personal use, many are fleet lease returns that have been ridden hard and put away wet. These are generally bare bones 'tradesman' builds, a well appointed truck will be more likely but not always well taken care of.

Stupid autocorrect, cummins not Cummings! I hate that.

I agree with Scott. 5.9 Cummings with a six speed. Get as few of the nice things as you can, skip power windows, power seats, power mirrors. If you can find one without ac or a stereo that would limit the amount of things that could go wrong. All joking aside, the 5.9/6 speed would be a top choice for me, right there with a 7.3l zf6 combo.

Ram. And I don't own one.

They still have a CP3 pump and a medium duty truck tranny if you get the Asian.

The recommendation will be what each person owns.

Mine ;)