Newer D/A owners, please chime in.

I have 13K on a 2015 3500 D/A LTZ. I had a 2015 6.0 that I put 15K on prior to that. Neither has/had to go to the dealer for anything. I pull both trucks hard. Initially I thought the tranny was odd shifting in the Dmax, it didn't downshift when I floored it like my others have. It seems to have "learned" as now it responds like my others have. I really like the pickup. A couple things I don't like. I don't like the location of the door locks on the switch stack on the door. It has been at the bottom and now it is on the top of the stack, small thing perhaps but if you have been driving GM trucks for a while it is an unwelcome change. I wish the fan speed didn't require 5 revolutions of the knob to get to max. I do think the rear seats should be heated and cooled on the high end models, I don't personally need it, but it should be there at these price points. I hear that GM will be moving the DEF fill to the fuel fill location in 2017. I don't find it to be an issue to fill. I don't think that the DEF tank itself is as big of an issue in real life as it looks like it would be. However perception is reality and it needs a better location. Seats are comfortable, leather quality is better than previous. They are a good looking truck, get a lot of compliments on it, even from guys driving a nonGM truck.