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Thread: .tun file help for 98 ~ 00 Black Box 5.7 Vortec / 4L80E

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  1. #4
    Carb and Points!
    Join Date
    Mar 2013
    Age
    41
    Posts
    3
    Here you go this is from my personal 98 K2500 5.7 4L80E. I will be doing a 0411 swap on it very soon. Why not do the 0411 swap while you are at it. It will look factory and should pass a smog test. Say it was required in order to put the newer model year engine in the truck. Most likely they won't even notice anyway.
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