At the end of last year I sold my 2011 3/4 ton duramax with 472K+ miles on it. I replaced it with a 1 ton Duramax While I have pulled a few loads with it, last weekend I put it to a bit of a test. 40' gooseneck with two 15,000 LB axles was probably overloaded with 20 - 5.5' x 5' round bales...