In 3 1/2 to 4-quart slow cooker, combine all ingredients except cheese and tortillas; mix well.
Cover; cook on low setting for 7 to 9 hours or until pork is very tender.
With 2 forks, shred pork slightly; stir well. If mixture has too much liquid, cook, uncovered, on high setting for 10 to 15 minutes.
To serve, with slotted spoon, spoon pork mixture evenly onto warm tortillas. Top each with cheese; roll up. If desired, serve with chopped tomato, shredded lettuce, chopped cilantro and sliced ripe olives.