2006 chev Express van overheating

If the pump is making nose or even leaking, yes it's water pump, sometimes it can be a water pump that's not pumping water! Open radiator cap, have someone press gas whole it's cool, notice a current in the radiator, if no, wp fins are deteriorating and it's not pulling water, this problem through my experience is caused by using reg tap water which has harmful stuff in there that causes fins to breakdown, have to use specific coolant for vehicle. Thermostat, if you start your car in the morning and it goes from cool to hot, thermostat stuck close time to change, or sometime they don't open all the way so your coolant stays in the engine getting hot!

I have a 2011 Chevy Express Cuteway. One day just started running real hot. I changed the water pump, serpentine belt. All the hoses, thermostat. Took it for a test drive still running hot. Should I change radiator next? Or is it time for a new truck?