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Thread: Trouble with tps and speedo sierra 2018 erratic tps

  1. 02-14-2022 #1
    elerico
    elerico is offline
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    Jan 2013
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    Trouble with tps and speedo sierra 2018 erratic tps

    Sierra 2018

    I have erratic tps value on highway
    Sometime reach 75% without touching pedal on cruise control

    Truck downshift in 5-4 without reach the 6gear

    Any tips ?!

    Second

    Truck is on 35.4 tire

    I change tire and gear in the wizard.

    Speedo is always offset and cant get at the right place
    If left oem value 3.42 and 30.87. Speedo is correct but i need to scale
    Shift point by 10% down

    Im all fuck up in this one
    Last edited by elerico; 02-14-2022 at 08:58 PM.
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