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    Wiring Help? LS 5.3l swap into 1999 Vortec Suburban

    Okay guys, I am helping a friend with an LS 5.3 swap into his 1999 Vortec Suburban. This is what we have: LS engine harness with plug in for only the C2 fuse/relay panel. The plan was to keep the stock harness for all of the interior get rid of the old black vcm box and install the ls 411...
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