Diesels...Ford vs GMC vs Dodge

I had a 2003 GMC D/A combo with crew-cab and short bed. Put a little over 103,000 miles on it inning years and had a couple of problems with it. Had all the injectors replaced around 40,000 miles, but I think that was a problem with that year GMC diesel. On top of that, the little window showing the gear the truck was in kept messing up and going blank. Had this replaced there times, once under warranty, once I paid for and two messed up while under the one-year replacement warranty. After it downshifted me from overdrive to a next lower gear while on the highway, we decided to get a new vehicle. It never had a problem towing our FW, a Jayco Eagle 215SD and a boat behind, with the last boat and boat trailer we had weighing 5,000 pounds fully ready for fishing and a full gas tank.