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Running E85 on a 2009 GMC sierra 4.8

This is a discussion on Running E85 on a 2009 GMC sierra 4.8 within the GM Trucks forums, part of the Vehicle Specific category; I'm curious If I can run E85 in my 2009 GMC Sierra 4.8. In HP Tuners Its got a section ...

  1. #1
    Junior Member
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    2009 GMC sierra

    Running E85 on a 2009 GMC sierra 4.8

    I'm curious If I can run E85 in my 2009 GMC Sierra 4.8. In HP Tuners Its got a section for flex fuel and looks like its running a virtual sensor. I do plan to put in an actual sensor once the turbo is complete.

  2. #2
    Junior Member
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    Dec 2020
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    Chandler AZ
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    2011 GMC Sierra 1500 2wd

    is your truck 'Flex fuel'
    is the stock gas cap Yellow then it is flex fuel


    PETE

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