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Thread: 16197427 ECM upgrade

  1. #1
    Carb and Points!
    Join Date
    Feb 2022
    Posts
    8

    16197427 ECM upgrade

    If you’re looking at upgrading your 7747 to the faster 7427. Here’s your chance.
    i have a 7427, already has the G2 chip adapter and 512 eprom in it. Also has new connector backshells to replace your original connectors. Also has the new correct knock sensor.
    All you need is the pin extractor and your favorite programming software.
    $120 shipped.

  2. #2
    Electronic Ignition!
    Join Date
    Dec 2019
    Posts
    18
    Hi v8zspeed,
    Do you still have this ecm?
    I have a 1994 GMC c2500 7.4l 4L80E and I believe it will work for me.
    Thanks let me know

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