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knomadd · 08-02-2016, 11:59 AM

Well, according to LT1swap.com, PSI and Speartech, the E78 ECM isn't supported or flashed by either of them. HP Tuners says the computer is the same as the 2016 Silverado HD, so it is supported by HP Tuners, but I can't just buy a harness for it. Looks like I'll need the diagrams to do it myself and possibly buy HP Tuners to learn it, or find someone who can tune it for me.

I really want to learn the HP Tuners stuff, so I might just go this route if I can thin the harness myself. We'll see if that works.

08-02-2016, 11:59 AM	#4
knomadd Registered User Join Date: Jul 2012 Location: Rosenberg, Texas Posts: 3,506	Re: Need wiring diagrams for 2016 6.0L/6L90 & E78 ECM Well, according to LT1swap.com, PSI and Speartech, the E78 ECM isn't supported or flashed by either of them. HP Tuners says the computer is the same as the 2016 Silverado HD, so it is supported by HP Tuners, but I can't just buy a harness for it. Looks like I'll need the diagrams to do it myself and possibly buy HP Tuners to learn it, or find someone who can tune it for me. I really want to learn the HP Tuners stuff, so I might just go this route if I can thin the harness myself. We'll see if that works. __________________ -Duane C/10 Club Texas member 1971 Chevy C10 "Brutus" SWB Fleetside 2016 6.0L (L96) 6L90E (driver/project) 1965 Pontiac GTO "Royal Goat" 400/TH400 w/AC (my baby)