Hi,
Yes sure, I have an 09 with the 6.0 in a 3/4 ton. If u would purchase a 1 ton dually with the same engine but using NG you get 301HP instead of 360HP in the 3/4 ton truck. Manufacturers can change an engines output ratings simply with computer tuning. There is a few companies out there that change the parameters of the engine and reducing TQ management. I use Blackbear EFI live tune and with that I bump both HP and TQ numbers up. Granted I don't run the truck hard, it gets babied more then anything. But there is a difference in towing especially when I run the full 91 tune. You can also use them for the 2015 truck that you have. Look up Blackbear performance, they specialize in GM trucks. Worth the money to me, and I can tell u that there is a difference when you run the tune. Hope this helps.