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Thread: P59 Gas gauge backwards after tank swap

  1. 09-19-2021 #1
    badcoupe
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    P59 Gas gauge backwards after tank swap

    Tuning a 03 Silverado that they?ve installed 07+ tank in, size is same but can?t seem to get it reading properly any tips or a workaround, this pcm doesn?t seem to have as many tables as some of the other ones. Thanks!
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  2. 09-19-2021 #2
    2xLS1
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    Has to be a 07 Classic tank, right? I can't imagine a 07 NNBS tank working in a 03.

    Fuel System>Primary Volume
    Fuel System>Primary Volume Gauge

    Copy the 07 values into the 03 tables.

    Here are the values if you don't have a 07 Classic file.
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  3. 09-20-2021 #3
    badcoupe
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    It?s out of an 11 actually. They did 07 up intake throttle body and tank swap. Also fighting some reduced power codes it has an Xlink on it as well. Thanks for the tables I?ll open them when I get to shop see if they?ll plug in.
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  4. 09-20-2021 #4
    badcoupe
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    Seems to have done the trick Thanks again! Now for the rain to go away so I can finish some drive tuning.
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