I ended up buying this tool to perform ABS bleeding procedure:
https://www.amazon.com/gp/product/B07XK1P8ZT
It did the job nicely in terms of walking me through it and we repeated it a few times on every axle. Then bled it all again, no bubbles anywhere and of course, the pedal still feels the same.
I have to stand on it like an ox to cause it to sink, so it isn't a safety issue but it bugs me. I have a bunch of recall work scheduled at the dealer in a few weeks and I'll see if they bite on putting a new MC in for me under my extended bumper to bumper warranty. If not, that will be my next project on this when I get around to it.
Thanks for all the input. I sure learned a lot and now am invested another 180 into the truck.
G