Diesel Switch by HP Tuners lets you power up from a stock calibration to one of five custom maps with the turn of a switch. Pair with HP Tuners' Switch on the Fly OS for complete control and performance of your diesel.
HP Tuners Diesel Switch (GM E41-L5P)
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.