There are a few things can cause coolant 'puking'. Head gaskets (bolt stretching/head lifting) and EGR cooler are two big ones.
In "My Home" on the yellow title bar on top, you can set up a 'signature' for your truck which may list Mods, trans (6 sp or torqueshift), anything maintenance related done previously, etc.
The search function, which many don't like, will pull up loads of info.
Take Care