Here's what the gauge looks like my 2001 2500hd, and you can see what it indicates as being too hot, this being said, the hottest I've ever seen it is about 180 in the summer, unloaded.
Directions. 1  In a Dutch oven, cook ground beef and onion until meat is no longer pink and onion is tender; drain. 2  Add the next eight ingredients; bring to a boil. 3  Reduce heat; cover and simmer for 1 hour, stirring occasionally. 4  Remove the bay leaf. 5  Serve with spaghetti. 6  Garnish with oregano if desired.
Drain and rinse in cold water. In a large bowl, combine the ricotta, Parmesan, 1Â½ cups of the mozzarella, egg, salt, pepper, and basil. Spread Â¾ of the spaghetti sauce on the bottom of a 13x9 inch baking dish. Spoon the cheese mixture into the pasta shells and place in the baking dish. Pour remaining spaghetti sauce over shells and sprinkle with remaining mozzarella. Cover with foil and bake at 350 degrees for 30 minutes. Uncover and bake for 5-10 minutes more.