Uploaded January 2017 | Updated September 2026, 1 hour ago

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EFILive tuning for the 2011-2016 Duramax is now available to meet your desired horsepower gains. Each AutoCal will come with 5 tunes. When you purchase a GDP Tuning AutoCal you will be ready to unleash the beast that’s is locked inside of your truck.

2011-2016 6.6L Duramax tuning comes as 5 separate files. To change power level you must re-program your vehicle with the AutoCal.

gdptuning.com