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What we should have done is unplugged the sensor and then turned the key on to see if the reading cleared. Continuity doesn't always prove a good wire, only a broken one.
Good job for hanging in there... Truck runs great and you learned something, both equally important!
I did check with the plug disconnected, that's what was driving me mad. When I unplugged the sensor the value was still showing on the Edge. It was showing 36psi no matter what I did.
Just wonder if the PCM retains the last value it received, part of the keep alive memory? That was going to be my next step, clear KAM and see what happened. I'm just going to leave it alone for now.
I do appreciate your help. This is a great board with great members.