2011 - 2016 Duramax LML GDP Tuning EFI Live Tune Pack
GDP Tuning lml-gdp-tuning-tune-pack
Availability: In stock
EFILive tuning for the 2011-2016 Duramax is now available to meet your desired horsepower gains.
2011-2016 6.6L Duramax tuning comes as 5 separate files. To change power level you must re-program your vehicle with the AutoCal.
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