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Thread: 7747 convert to 7427

  1. #1
    Carb and Points!
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    7747 convert to 7427

    I have a 1989 GMC K3500 with a 454 and a TH400 with a 1227747 ecm with the soldered in chip. I want to put a 4L80e in the truck. Was wondering if anyone knows if I can use the ecm out of the 1991 GMC K3500 with a 350 and a 4L80e (donor truck) with ecm 16197427 as it has a removable chip. Now I know at the least the chip will need to be reprogrammed with the bin from a truck that had a 454 and a 4L80e in it. I also know if it is possible the ecm pins will have to be relocated from the 1227747 pin locations to the proper spots in the 16197427 ecm. Anyone done it or have any helpful hints ??
    1970 Chevelle

  2. #2
    Carb and Points! Stitchnwrench's Avatar
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    try this thread its got some info Thread: 16197427 PCM Information $0D its in the GM tbi tuning

  3. #3
    Carb and Points!
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    K Will try ...thanx
    1970 Chevelle

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