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    GMC Sierra Power Programmers & Performance Tuners

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    GMC Sierra DiabloSport inTune i2 Tuner

    GMC Sierra Hypertech Max Energy Programmer

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    Latest Customer Reviews

    Range Active Fuel Management Disable Device Reviews


    Totally happy

    Reviewed By JAMES G (HERTFORD, NC) Reviewed for a 2013 GMC Sierra —7/21/2017 5:38 PM

    It is like driving a new vehicle. No more switching back and forth between 4 and 8 cyl. Even better gas mileage.

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    DiabloSport inTune i2 Tuner Reviews


    Works great

    Reviewed By Kevan C (Hagerstown, MD) Reviewed for a 2012 GMC Sierra —7/5/2017 2:02 PM

    Bought a pre-owned Sierra 1500 with the Vortec 6200 where the previous "computer" calculated MPG was 10.2 average. I cleared the computer, installed the MPG default tune with firm shift. With 2 tanks of regular 87 octane I now get overall "computer" average of 16.7. I will hand calculate at next fill-up.

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    Hypertech Max Energy 2.0 Programmer Reviews


    2014 GMC OIL SAVER

    Reviewed By George C (ROANOKE RAPIDS, NC) Reviewed for a 2014 GMC Sierra —5/24/2017 7:40 AM

    I bought the Max 2.0 because other reviews had said their trucks had stopped using oil when the 4cyl program had been turned off. I have run this program now for close to a thousand miles and haven't used any oil with the engine running on 8 cyl all the time. Gas mileage has remained about the same as before, I haven't noticed any problems with the Max 2.0 programmer. My 2014 GMC sierra has a lot more horse power running this programmer .

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