Same here, my dealer called to ask me how im enjoying my truck i mentioned the shifting could be a bit smoother and throttle response is a bit laggy down low, nothing a good tune couldnt fix to smooth things out a bit. he mentioned that they can see every flash, and when data is downloaded they know whats been done. So I called my best buddy in the northeast who runs a chevy dealership and he told me the same thing. i want to get it tuned so bad but i paid for the extended warranty and would hate to have wasted that loot