I have had a GM truck since 88. This is by far the finest truck i have owned. the Duramax/Allison combo has performed flawlessly. it has delivered power and dependability that to this day still satisfies my decision to forgoe the LT 5.3 gasser and go with the LS diesel. I travel for my job and use this as a sales vehicle. No regrets. I put 285's on and the truck looks great!