Look at the generator after you wash it. There is a company called PowerGen which makes 6v and 12v AC Generators that exactly match the old 6v and 12v DC generators so that they will bolt up to existing brackets. It could be one of those.
My guess is that it's an original 12 volt DC generator from a later GM vehicle. Just because something is converted to 12v doesn't mean is has to have an AC generator.
Nothing wrong with that since I doubt you have a million electrical devices sucking power from your battery.
Last edited by Otto Skorzeny; 08/18/2022 8:21 PM.