my 2004 4.3 engine is constantly overheating
When the truck idols, its fine. when driving the temp needle goes above
210. heat comes down to the floor board that almost scalds your feet
through your shoes. if i turn on the AC temp really shoots up while driving.
Fan is strong, replaced coolant sensor, thermostat, flushed radiator system
of red rust, and checked for leaks. I know the pump is working becouse
when i crank it with the cap off it sucks the coolant on down. cleaned out
around the grill and radiator. evn checked to make sure the oil and coolant
were not mixing. what else is thier to do? im lost!!