cover and cook on low (this recipe does not work well on high) for 1 1/2 to 2 1/2 hours for boneless chops. (if using bone-in chops, your time could be up to 5 or 6 hours on low.) pork chops can dry out easily, so be sure to check them early, especially if it is your first time making pork chops in the slow cooker.