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Thread: gmc savana 2013 (gear ratio )

  1. #1

    gmc savana 2013 (gear ratio )

    hi all ! can somebody tell me how to change gear ratio on that vehicule , i need to tell the pcm that i got a 4.56 at the rear end is that possible and i got the MPVI2 and the vehicule is a savana 2013 help will be apreciate thank

  2. #2
    Senior Tuner TheMechanic's Avatar
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    Jan 2014
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    In the upper menu under "Edit". Use the Gear/Tire wizard. It lets you change gear ratio and tire size so your speedo will be correct.

  3. #3
    thank you buddy

  4. #4
    it says validation of input failed invalid tire size and invalid gear ratio i got 3.42 and tire is lt245/75r16 need to put 4.56 gear ratio ??

  5. #5
    Tuning Addict 5FDP's Avatar
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    May 2012
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    Post the tune file here.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  6. #6
    the problem is fix it was my fault , i had to write 4,56 instead of 4.56 the error was a (,)