Place pork in the slow cooker and season with salt, vinegar, garlic powder and liquid smoke.
Cover and set to high – for 6 hours.
Remove pork and transfer onto a large dish; reserve all the liquid in a cup and set aside.
Shred pork with two forks and put back in slow cooker along with about 3/4 cup of the reserved liquid and the BBQ sauce (for every 3 oz cooked pork, use 2 tbsp BBQ sauce).
Cook on high one more hour.
Recipe and Picture from http://www.skinnytaste.com