Remove the silver skin if any is on the pork tenderloin and set aside. Roughly chop onion and place it in the bottom of the slow cooker. Add water so that it covers the bottom of the slow cooker about one to two cups, it does not have to cover the onions.

Mix all the seasonings and the sugar together. Rub the mixture over the entire tenderloin. (If there is any left over it can be sprinkle over the tenderloin once it is placed in the slow cooker). Place the tenderloin into the slow cooker for 6 to 7 hours on low.

After the cooking time remove the tenderloin. Discard the onions and the liquid from the slow cooker. With two forks pull the pork apart. Once the meat is shredded place it back in the slow cooker. Add the BBQ sauce and continue to cook for another hour. Serve on buns for a delicious sandwich.

To make the BBQ sauce- This can be done shortly before the pork is done cooking. In a small sauce pan combine all of the ingredients. I like to heat my BBQ sauce before adding it to my meat. So over medium heat cook until heated through. If you prefer you can purchase BBQ sauce and use that.