A great device that makes you independent of tuners. Many features including fuel-saving modes, increased torque, fan and gear programming, and more. Officially supported vehicles: Dodge / Chrysler / Jeep / RAM (mostly 2003-2014 depending on the model) Ford (approx. 1996-2023, gasoline and diesel in some models) GM (Chevrolet / GMC / Cadillac) (approx. 1999-2016)