01 -  Trim excess fat from the pork shoulder and season evenly with salt, black pepper, and smoked paprika. 
 02 -  Place pork shoulder into a slow cooker. Add apple cider vinegar and sprinkle brown sugar over the meat. Cover and cook on low for 8 hours or until the pork is fork-tender. 
 03 -  Transfer cooked pork to a large bowl and shred using two forks. Mix in barbecue sauce until pork is evenly coated. 
 04 -  Allow shredded pork to cool completely. Divide into portions and place in freezer-safe bags or airtight containers. 
 05 -  Thaw portioned pulled pork in the refrigerator overnight. Reheat gently and serve warm on hamburger buns.