I just bought a 02 Duramax well turns out the previos owner had 35's on it and now it has 32's. I need to recalibrate my truck and called tacoma speedometer. they told me to by the superchips p/n 2806. So my question is I currently have a bully dog outlook. What should I do what are my options. Does anyone have a Superchips Tirepac I can use?