Cut pork into 1-inch cubes. In 4- to 5-quart slow cooker, mix pork and remaining ingredients except flour and butter.
Cover and cook on Low heat setting 6 to 7 hours.
In small bowl, mix flour and butter; gradually stir into stew until blended. Increase heat setting to High. Cover and cook 30 to 45 minutes, stirring occasionally, until thickened.