The second dealer just called and told me that anything 248 degrees or less is normal operating range. WHAT??? And they will not do anything more. I am thinking of just taking it to a mechanic buddy of mine and have him take a look. It won't be under warranty, but I think it will be worth the peace of mind. Very odd.Man I feel ya! This has so aggravated to say the least. I'm on Dealership number 4. If they can't find the problem they can buy back the ##$%^& truck!