yea it might, but with the smoke and overheating that would be my guess. Any coolant loss if so thats almost a dead give away. What do you have done to your truck? From what i hear stock 6.0's dont like tuners or chips usually blows a gasket
I sorry took so long to get back. To the answer I have had it in the shop 4 times in the last 5 mnths first work was the egr sensor then exhaust manifold gaskets and manifolds. then it was the oil pump its one thing after another.