Chevy Silverado 1500 Overheating Issue
I have a 2006 Pickup, 5.3L with an overheating issue. Initially, the overheating was intermittent, so i figured it was a thermostat (sticking at times). I replaced the thermostat and the problem still persisted, and actually the engine seemed to be overheating more frequently. I then changed the water pump (the old pump was not leaking coolant) and the engine is still overheating. The engine overheats very quickly (within a few minutes) and the coolant boils in the over-flow reservior.
IMO is seems like the coolant isn't even circulating through the engine. I am at a loss as to what the problem could be? Any help would be greatly appreciated.
BTW, the coolant in the reservoir is very clean, so I assume the radiator is as well. This vehicle has never had any radiator damage or had the unit flushed.