The HP Tuners Diesel Switch is a hardware 6-position rotary switch for HP Tuners' Switch on the Fly OS. It is built for 2017 and newer Chevrolet/GMC trucks with the 6.6L L5P Duramax and 2013-2024 Ram 2500/3500 trucks with the 6.7L Cummins. Turn the knob to go from the stock calibration to one of five custom maps.
Fitment
The Diesel Switch