I have always been a GM owner and in fact I still own an H2 and my wife XT5, I will own them until their just worn out. I have owned at least 1/2 dozen Chevy trucks, my last 2 HD's were a 2013 LML and 2019 L5P and they were both reasonable when it came to dependibility, and the exception of emission (mostly things that had to do with DEF, tanks and whatnot). I used them to tow both a large travel trailers and 5th wheel all over the US. I sold off my 2019 when the last 5th wheel was sold. It was powerful, ran great and the drive train was super, I would have put that up against any Ford or Dodge of the time. I just didn't need it anymore and now my plans are changing again where I need another Diesel.
Why don't I want a new 2500? I have 2 very close friends that owned a 2020 2500 and the other a 2021 3500. Both have had major multiple issues with the 10 speeds and both traded or sold them off, one went the Ford way, now, he says he will never go back to GM, the other sold of his 2020 and bought a used 2019 2500, funny he really wanted to buy mine.
I kinda think the new the front clips from 2020 on up on the Chevy are just fugly, my 19 Z71 2500 was fricken georgous, it had a look I would buy again in a minute. The look plus the Allison 6 speed was such a real bell ringer! About the only thing someone could complain about was the dated interior.
Mechanics are so important, Knowing what I know real world I really don't want one of those "Branded" Allisons. And if I am going to be stuck with the 10 speed I might as go with a better looking truck tht has more HP and Torque, plus it seems Ford got the better of the 2 trans. when it comes to the 10 speed, to me neither are great or superior to the Allison 6 speed.
As far as the Ford Diesel is concerned even Banks is impressed with the power and build of the new Ford Diesel and he too is a major GM fan. I really hope the 26MY will (hopefully) get a face lift, perhaps use the engineer that did the face lift on the Colorado. And GM will need something to go up against the new Superduty.
Plus some of the growing pains will be resolved with the trans or maybe they will dump it and use the new real Allison 10L1000 transmissions. But if I was nothing changes I will probably get the Superduty thank goodness I still have some time, and will see how well things shake out with the new Superduty, I really hope GM wakes up and comes out with a real bar-raiser.
Since this is a GM forum we all take pot shots at Ford trucks, but there must be a reason why they are the #1 selling truck brand for 47 years running and right not they exceed GM in almost every power and towing rating. Say what you want, you can never have too much torque when towing too. Still haven't jumped ship yet and Being very Objective, We shall see!