Superchips Mileage XS, Chevy/GMC 6.6L

If you are looking for the secret to staying on the job or on the road during your next trip you've come to the right place. Superchips reputation is built on delivering impressive performance street, track and trails. The Mileage XS fuel economy tuner saves diesel truck and SUV owner's real money providing up to 20% in fuel economy gains.

Squeezing every last bit of energy out of a gallon of diesel for improved mileage is just as much a science as making big horsepower gains. By tuning your vehicle's injection, ignition and transmission shift characteristics the Mileage XS delivers savings you can put in the bank instead of the tank.

The Mileage XS also lets you read and clear trouble codes, recalibrate the speedometer for tire size or gear ratio changes. Free updates are available using the internet update software. There is even an upgrade program that allows you to trade up from your fuel economy tuner to a more aggressive performance tuner such as VIVID, Flashpaq or Cortex.