My coolant/water housing had an issue and caused a leak by the thermostat and it caused my engine to overheat while I was driving. I had my 10yr old son in the vehicle with me and had I not had the opportunity to pull over into a Walmart parking lot almost immediately in order to get some coolant into my truck, it would have been disastrous. The warning for high engine temperature was the only warning I had as I was unaware that I had any type of coolant leak. This could and may have caused some more damage than just the mandatory repairs that I had to do because this is my mode of transportation to/from work for the Federal Government.