In a bowl, whisk together BBQ sauce, apple cider vinegar, beef broth, Dijon mustard, Worcestershire, garlic powder, smoked paprika, salt, and pepper. Pour over pork. Cover and cook on LOW for 8 hours or HIGH for 4–5 hours, until fork tender. Shred with two forks.
1/2 cup BBQ sauce, 1/4 cup apple cider vinegar, 2 tbsp Dijon mustard, 2 tbsp Worcestershire sauce, 1/2 tbsp garlic powder, 1/2 tsp smoked paprika, 1/2 tsp salt, 1/4 tsp black pepper, 1/4 cup Beef broth