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.
In a large saucepan heat oil over medium heat. Saute onion, green onion and garlic. When onions are clear, stir in tomatoes, basil, oregano and sugar. Bring to a boil, reduce heat to low, and simmer for 20 minutes. An easy homemade spaghetti sauce with tomatoes, onions, garlic, and herbs.