Well, I was mistaken. It's not antifreeze I'm seeing, it's motor oil being blown out the #7 cylinder showing it wet around the head. They did a test on everything and it shows that it's either coming from piston rings or a bad valve seal. The mass air flow sensor was covered in junk as well. I have no clue why, because I was religious on changing the air filter. I probably should've cleaned it when I bought the truck at 125k miles already on it.
So if it's bad piston rings, I"ll be replacing the engine. And they'll fix the valve seals if it's just that and replace the heads as well. They're doing what they call a leak down test , I think, today to get the final diagnosis. Either way, it's gonna hit my wallet hard.