slow cooker Barbecue Pork

Place onion slices into the bottom of a large slow cooker. Dot roast with cloves; place roast in slow cooker along with the water. Cover and cook at least 8 hours (or overnight). Take roast from slow cooker, remove cloves and shred pork. Discard liquid and onions from slow cooker. Place shredded pork, barbecue sauce and sugar in slow cooker and cover. Cook at least 2 more hours. Serve on toasted buns with slices of fresh onion (if desired).