Sprinkle pork chops with salt and pepper. In 12-inch skillet, heat oil over medium-high heat until hot. Add pork; cook about 5 minutes or until browned, turning once.
In 3 1/2- to 6-quart slow cooker, place pork. Sprinkle onion over pork. Pour pasta sauce over top.
Cover; cook on Low heat setting 4 to 6 hours.
Place pork on serving platter. Top with sauce. Sprinkle with cheese.