Need electrical diagram help
02-24-2014, 05:44 PM
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Need electrical diagram help Me and a friend of mine are putting a 5.3engine and a 6L80E trans from a 2012 GMC Sierra into a 1969 Chevy full size truck. We are trying to figure out all the details. We are using a E38 ecm. On connector J1, pin 9 (brake switch signal), does it require a positive or negative signal? Any help is appreciated.
