Installed the new master cylinder this morning. Didn't fix it. The only part left in the system is the clutch hose that runs from the master to slave cylinder. Dealership item that cost $88 dollars.
Since I now have the entire old assembly outside of the vehicle we hooked it all up and ran water through for testing. Everything works perfect. Master cylinder pumps, slave cylinder moves freely, and all hoses are clear.
I thought we had just put this clutch kit in last Christmas but looked it up and it was two years ago.
Clutch still engages fine inside the transmission. I can crank the truck in gear and drive it, just can't shift gears. Checked out the slave cylinder through the access hole in the transmission and it seems to be fully extended against the pressure plate (explains why I have no pedal pressure).
Now I'm really confused. I'm no expert but I would think that the transmission would be stuck in neutral at this point yet it's the opposite.
I'm guessing the next step is a new clutch kit.