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Speartech will add a fuel pump relay/harness, and add extra wire if you want to move the ecm into the cab. Its been a few months since I talked to them about their services. I think they rework a stock wiring harness for about $450. I've heard good things about them from other LS1 hybrids. I guess the other option is to buy a wiring diagram for your engine and just adjust the harness for your appl. Sounds easy enough right??
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