Q: truck overheating
truck overheats during extended drives or putting more than normal strain on the engine ie pulling a boat or going up big hills. truck will not overheat while sitting still or normal driving. as soon as i slow down or turn on heater temp goes back down to normal. i have flushed and changed coolant and changed the thermostat.
My car has 104000 miles.
My car has an automatic transmission.
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