JeffN, Thanks for posting!
I just returned from my nearby Electrify America station where I have made numerous attempts to charge with no luck.
I really didn't need to charge but was anxious to see if this would fix my issue. Indeed it did. Worked like a charm. The build date on my Bolt EV is August, 2017. My vehicle has only been DC Fast charged one other time since I've owned it. I am the second owner, acquiring the car with some 11,000 or so miles on the odometer and have no knowledge of the previous owner's charging habits.
Thanks also to Eric Way and his "News Columb" Videos.