Sprinkle roast with 2 tablespoons fajita seasoning. In a large skillet, heat oil over medium heat; brown meat. Transfer meat to a 5- or 6-qt. slow cooker. In a large bowl, combine the next 8 ingredients and remaining 1 tablespoon fajita seasoning; pour over meat. Cook, covered, on low until a thermometer inserted in pork reads at least 145°, about 3 hours., Remove roast; cool slightly. Cut pork into bite-sized pieces; return to slow cooker. Heat through. If desired, serve pork with rice and hot sauce.