Rub pork roast with season rub, place in crock pot, add 1 cup of root beer, and onion wedges.

Cook low for 6 hours or high for 4 hours.

Once finished, make sauce on stove in sauce pan. Add garlic, chili sauce and remaining root beer soda. Bring to boil, keep boiling for few moments, then turn off. Let cool.

Once cooling, pull the pork apart. Mix with sauce and serve.