Trim pork roast of any large pieces of excess fat then cut into 4-6 large pieces and place in the bottom of 6 quart slow cooker. Season with salt and pepper.
In a separate bowl, whisk together remaining ingredients until smooth then pour over pork and turn over each hunk over with tongs to coat in sauce. Cover then cook on LOW for 6-8 hours or until pork shreds very easily with a fork.
Strain juices from crock pot into a fat separator. While the fat is separating shred the pork then add back into the crock pot. Add enough juice to moisten the pork then serve with buns. If using gluten free buns, be sure to toast them for the best texture and to ensure they hold up to the juicy pork.
Notes
I highly recommend a fat separator to easily separate fat from cooking juices.