Love our Duramax’s. My family owns 3, and every diesel in the county neighborhood is a dmax, save for the weird guy around the corner who drives Fords and fixes them often.
All diesel trucks can have issues. We have a new one ton dodge 3500 with a cummins, and we love it! I like the jake brake on it, I don't have to use the brakes a lot. We also have a few older Ford one tons and love them, but we always favorite the dodge.
We had a one ton chevy last yesr, and did not like it at all. We were not comfortable pulling anything with substantial weight behind it. We ended up selling it. We own a small construction company so we are always hauling excavators, bucket loaders and bobcats around.
I love our duramax! Its never given me any problems hauling. They all are gonna have their issues, but i will say out of the majority of our group the ones with duramaxs have the least amount of problems if any. Its all personal preference when it comes down to it :)