Took the old cats and O2 sensors off and replaced them with Walker cats and Bosch OEM sensors.
Drumroll please.......
She is alive!!!! Turns out the cats were in fact destroyed and plugging up my engine. Thanks for the tip on that guys. I would have never thought to think about cats causing such a big problem.
I did run into a small problem with the new cats and downpipes though. For whatever reason, the passenger side downpipe wont line up correctly with the exhaust manifold flange no matter how much I play with it. As a result it has a NASTY leak right at the manifold flange. As a result, the fuel trims are WAY out of whack for bank 1, which I assume is the passenger side. Bank 2, the driver side which is all tight, has nice low and consistent fuel trims.
I also located a few drips of coolant coming from the water pump, right about where the lower radiator hose comes out. I cant tell if its from the water pump gasket or the hose. That will be further inspected after the exhaust is fixed.
Also the thing needs brakes. It bucks an vibrates like crazy when stopping. I've never felt such warped rotors before. Any idea what size rear drum shoes I need? I have the EDGE package but could not fine the axle tag anywhere on the truck.