Rub pork with dry rub, set aside.

Set Crock Pot on High; put onions on bottom. Pour half bottle of BBQ sauce.

Put pork inside and pour rest of BBQ sauce. Put brown sugar, garlic powder, salt and pepper. Cover. Set timer to 1 hr.

After timer stir ingredients and add vinegar, worcestershire sauce and mustard. Set timer to 1 hr.

After timer stir again and season if you haven't achieved desired tasted. Set timer to 2 hrs.

After timer use fork to pull pork and let sit for another 10-20 so the meat gets all the wonderful tasty sauce all over it.