Pulled Pork

3 pounds boneless pork roast
1 ½ c ketchup
¼ c packed brown sugar
¼ c red wine vinegar
2 Tbsp Dijon-style mustard
2 Tbsp Worcestershire sauce
½ tsp liquid smoke flavoring
½ tsp salt
¼ tsp black pepper
¼ tsp garlic powder

Place roast in crock pot slow cooker. Combine remaining ingredients in large bowl. Pour barbecue sauce mixture over roast. Cover & cook on low 8-10 hours or 4-5 hours on high. Remove roast from crock pot; shred meat with 2 forks. Place shredded meat back in pot. Stir meat to evenly coat with sauce. Spoon meat onto sandwich buns.