Most of us just want you to fix your truck. Correctly. The first time. My "frustration" tone in my message comes from the fact that back before the internet was invented, my truck was overheating constantly. I changed the thermostat 3 times, which by the way, is not a simple matter of taking out 2 bolts and just swapping it out. It's removing the alternator, vacuum pump, fuel lines and filter head mounting bracket, at least on my 6.9. THREE TIMES I changed it out, each time believing somehow I had gotten a bad thermostat. Thats a lot of man hours, a lot of wrenching, scraping the gasket material off and all that. On the third trip out, in frustration I pounded on my instrument cluster to show that temperature gauge who was boss, and low and behold, it dropped right down the normal range. It turned out my problem was the illustrious IVR (instrument voltage regulator) sticking between cycles. My problem was NOT the cooling system. Never was. It was a minor electrical problem. So you see... if I seem pissed off because you won't try something simple first, you can understand that it's only because I'm still kicking myself after over 20 years, and I want you to benefit from my mistake. If you don't learn from my being a fool, then I was a fool for nothing! Don't swap parts until you have verified as many ways as possible that they are bad! It's a painfull lesson I already learned FOR YOU.