Place one sliced onion at the bottom of crock pot. Stud pork roast with cloves and season with salt and pepper. Place roast in crock pot on top of the sliced onion.

Cover with the second sliced onion and add enough water to fill crock pot two thirds of the way. Cover and cook on LOW 8 to 12 hours or overnight.

Remove roast. Remove and discard cloves, bone and fat as well as any water, onions and grease remaining in pot. When meat is cool enough to handle, use a fork or your fingers to pull it apart until the entire roast is shredded.

Return the pulled pork to the crock pot. Mix in the chopped onion and BBQ sauce and cover. Heat on HIGH for 1 to 3 hours or until the onions are soft.