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Type: Posts; User: Chevelle454

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    21,887

    K Will try ...thanx

    K Will try ...thanx
  2. Replies
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    21,887

    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...
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