1. Place carrots into the bottom of the slow cooker. Generously salt and pepper roast, and place on top of the carrots.
2. In a bowl, combine the cola, beef broth, gravy mix, and onion soup mix. Whisk until well combined and pour over roast.
3. Cover and cook on low for 8 - 10 hours, depending on your slow cooker. Mine takes closer to 10 hours. When done, the roast should easily pull apart with a fork.