In a large gallon-size zip bag, combine all the spices in the rub. Add the pork to the bag shaking well to coat the meat. Let rest at room temperature for 30 minutes.
In a large bowl, combine all the ingredients for the slatherin' sauce- maple syrup through garlic. Mix well. Pour into the bottom of a slow cooker or a crock pot. Set the temperature of the slow cooker to low.
In a heavy pan over high heat, add 1 tbsp of vegetable oil. Heat oil until just smoking. With heavy duty long tongs, add spice-coated pork and brown all sides taking care not to remove the spice rub. Place browned pork into the slow cooker nestled into the sauce and cook for at least 6-7 hours, covered, or until meat falls apart with pulled with a fork. Meat should be tender. Using tongs, turn the pork at least twice while cooking.
Remove pork from slow cooker. Place the meat on a cutting board. Cover with foil and let rest for 10 minutes. Chop or pull pork into bite-size pieces. Spoon 1/4 cup of the sauce from the slow cooker into the chopped pork. Pour the remaining sauce from the cooker into a serving dish. Serve chopped pork on sandwich buns with pickles and extra sauce for slatherin'. Serves 5-7