Place pork loin in slow cooker. Cover with diced tomatoes and green chilies, 1 cup barbecue sauce and water; cook on low 4-6 hours.
Cut up cooked meat and place in Dutch oven along with juices from slow cooker. Add remaining barbecue sauce, tomato sauce, chili beans, chili seasoning, barbecue seasoning, onion powder and garlic powder. Season with salt and pepper, to taste.
Cook over medium heat 20 minutes, stirring occasionally. Serve with sour cream, shredded cheese and corn chips.