I don't do cheap mods, I have several CPS's on hand and have swapped them out a couple times.
UVCH, if it was this then it should not pass the KOEO Buzz test. Also if it is the UVCH I doubt it would be both sides at the same time. Also if it is an IDM issue I don't think it would pass the buzz test.
I have owned this truck since the first mile was put on it. I have done pretty much all the wrenching on the truck myself. Except for a few things.
I will get the radiator back in and crank it over to see what my icp reads during cranking.