I took and tried something for sh#ts and giggles, I unbolted the fan shroud and covered the radiator with a piece of cardboard and my temp gauge started to rise. After ten minutes or so it got into the normal range so I check my hoses and both heater hoses were hot along with my uppper radiator hose. I turned the heat on in the truck and its nice and hot. So Im assuming that the thermostat is stuck open. Also my windows started to fog with the heat off.... I'm assuming i have a small hole in the heater core, I couldnt really tell if I could smell coolant since I was already covered in it from the flush and putting new coolant in.