If you put it in the comment box they will preload the map. Any questions let me know.I did list the mods on the comment section . They have it shipped, but not too much communication on their side on if they preloaded the changes
The ECU is behind the glovebox to the right. The one all the way to the right with 6 plugs. I think top is white, then grey then black etc. kinda a pain to get to. You should notice better response. When you start to tune it is when it gets better. Just follow the instructions. If you can't find them let me know and I'll send you a link. Or email gadget at URD.Got the calibrator today and hope to install tonight . Not sure if I will notice a difference or not since the truck hasn't got but 215 miles on it . How important is the custom tune? By the way , where is the ECM