truck bogs out when you hit the gas

In the winter it's not uncommon to get water in the fuel at a gas station. This is a Diesel, right? Water is a problem in Diesels and I think that's what's wrong. Get the fuel filter off and see if there's water or dirt in it. Replace it with a new one unless the fuel is clean and the filter is already new. Find a GM specialist or a Diesel specialist if you need help. Here's a directory link for you: http://repairpal.com/chevrolet-repair-in-long-branch-new-jersey

May sound Silly but i'd first check the Air/Fuel filters... as these both cause the mentioned troubles.