Well I was able to start tuning a 2500 HD Silverado yesterday for the first time. Its bone stock. All I have done so far is adjust a few PE settings, Trans Shift Settings and Spark. WOW what a difference already. With the tow/haul mode off it seems just like the stock truck. With it enabled it shifts really quick and firm now. 1-2 it actually broke the tires loose. I have also totally disabled TQ mgt as well. Going to tweak it some more and see what happens. Very nice gains so far with just a stock truck. The ol SOTP meter says its a nice increase.