Chevy Express 6.6L 2011-2016, EFI Live Autocal Tuner by GDP Tuning®. When you purchase a GDP Tuning AutoCal you will be ready to unleash the beast that's is locked inside of your truck.
- Tuning comes as 5 separate files. To change power level you must re-program your vehicle with the AutoCal
- Rampage requires a lift pump in order to see the full 230HP increase.
- Perfect to help you unleash your engine’s potential
- Cutting-edge technology for unbeatable performance
- Unsurpassed in functionality and reliability
- Guaranteed to deliver lasting service life
GDP Tuning® is a well-respected manufacturer of high-quality truck performance tuners in the automotive industry. To meet your desired horsepower gains and give you control of your vehicle's most critical settings and functions, GDP Tuning offers a wide range of cutting-edge tuners, switches, and EGR delete kits. Whether you choose Powerstroke, Duramax or Cummins products, the tuners are sure to give your truck greater horsepower and torque. So, be prepared for outrageous performance since GDP Tuning products will unleash what is locked inside of your truck.