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.
To use uncooked spaghetti noodles in the slow cooker, prepare your favorite from scratch slow-cooker spaghetti sauce recipe according to the recipe directions. During the last 30 to 45 minutes of the sauce's cooking time, add the uncooked spaghetti directly into the sauce and stir gently. For very thick or meaty sauces, add an additional 1/2 cup to 1 cup of water at the same time you add the uncooked spaghetti.