Barbecue Steak and Pineapple Kabobs

KC Masterpiece® Kansas City Classic barbecue sauce1 cup lemon-lime soda1.5 pounds sirloin steak, cut into 1-inch cubes2 large red bell peppers, cut into 1-inch pieces1 large onion, cut into 1-inch pieces1 fresh pineapple, cut into 1-inch pieces