Final report on this issue before we move on to some other issue---we got a new AC Delco VR from the friendly local parts supplier, got it installed, did the usual polarization of the GENERATOR, cranked the truck up and voila---the sucker charges like it is supposed to. I guess that I spent too much time "assuming" that the NEW VR was OK, when it is common knowledge that just because it came out of the box new doesn't mean that it will work as intended. As far a pairing the VR and gennie, that seems like it would be a good idea, just that in my 77 years, I have never encountered it.
BTW, this unit is as the other AC Delco VR was, stamped "Made in the USA" on the main frame. For what it's worth!
Thanks to all you who gave me input on this problem---maybe I can return the favor for some other poor soul wondering what the hey is wrong with his/her 'Bolt in the future.
