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    Ls swap using only P0411 ECM, no black box

    So I am going to swap a built 5.3 into my 1997 extended cab and Would like to swap the P0411 as well. I know this has been done plenty of times but what I find everywhere is leaving the black box installed and piggy backing a P0411 ecm to run the LS engine while the Blackbox runs the truck side...
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