From looking at the specs, I think it's reasonable to assume that the 3500 is now only a dually, as Chevy has done for a number of years. Note also the use of a single swing arm front suspension, similar to what Ford has used since 2005. Another interesting sidebar is the return to 15K mile oil changes- when is the last time you saw that? The front axle disconnect is a welcome addition- between that and DEF, these trucks may be somewhat economical again. I'm curious about the two radiators, the article didn't really explain the cooling system. Perhaps they are referring to the intercooler as a radiator.