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https://www.ombwarehouse.com/voltage-regulator-internal-12-volt-self-exciting-for-delco-alternators.html Part # 230-12029 or D10SE-12 This is the part number he sent me and above is what I found with a simple Google search. I hope that helps. I am still going to let him rebuild mine.

I reached out via Email to the rebuilder. Pending he don't reply " Ancient Chinese Secret " I will forward the part number on my next post. Be safe.

Also keep in mind you can get self exciting voltage regulators installed in the stock alternators and then the idiot lights in the dash are not needed. I had them put on 2 plow trucks that I had to work on every year or two. That is over with now. Good Luck.

Ship it PA and I will fix it for you. You can drive it back home and enjoy the scenery. Sounds like a challenge and it is probably something simple. The guys at the dealerships were babies when they built these trucks. I was a young guy just starting out when they came to the dealership I worked...