Duramax Feedback

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  • Justin Hammond, LA on

    2016 GMC Denali 2500HD… I was very skeptical of a plug’n’play module, but I was able to go from 17-19 MPG @ 70MPH up to 21-23 MPG @ 70MPH. Throttle response has changed drastically and reduced the lag significantly. Great product that lives up to all it claims!!

  • Kevin on

    2015 3/4 Denali I pretty much drive the same thing everyday 20 miles to and from work with a little city driving my average was around 16.5 after 1500 miles with the Stealth I am at 19.6 I’ll take the 3 mpg!


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