In a medium saute pan, brown the ground beef; drain.
Add the onions and bell pepper and cook until the onions are translucent, about 5 minutes.
In a slow cooker, combine the diced tomatoes, tomato juice, beans, pumpkin, chili powder, cumin, pumpkin pie spice, salt, pepper and hot sauce. Stir to combine. Add in the cooked beef and stir.
Cook on low for 6-8 hours or on high for 4 hours. Season to taste with salt and pepper.
Serve with your favorite chili toppings, such as cheese, sour cream, or tortilla strips.