InstructionsPlace the onion in the bottom of the slow cooker. Rub the outside of the roast with salt, pepper and garlic powder.Pour the Dr. Pepper over the pork and cook on high 4-5 hours or on low 7-8 hours.The meat will be very tender. Using 2 forks, shred the pork and place back in the juices.Add barbecue sauce to taste. ...Serve on crusty rolls with coleslaw.