I have done quite a few GM EFI powertrain swaps including LS family DBC and DBW. I usually completely rework factory harnesses but have built a couple NEW ones as well.

However I am still a little unclear about the differences btwn the red/ blue and green/blue Gen 3 PCMs. I have noticed differences in HO2S wiring and I think alt wiring.

What, if any other differences are there. Can either be used with DBC or DBW assuming proper cal application?

What are the different options for alternator wiring? Can the brown wire go straight to a charge indicator lamp provided that gen f terminal dtc is set to not reported? Does the gray wire always need to be ran to the PCM?

Thanks guys...