Place pork chops in a large Ziploc bag. Pour sugar-spice mixture over pork chops.
Seal bag, pressing out as much air as possible. Shake bag and rub pork chops until the meat is evenly covered with the sugar-spice mixture.
Refrigerate for 4-6 hours, or overnight.
Remove pork chops from refrigerator approximately 30 minutes before cooking.
Preheat grill to high.
Shake off excess sugar, and place pork chops on the grill, away from the direct heat.
Grill on high heat for 7-10 minutes total, until a meat thermometer registers 145 degrees F at the center of the meat. Turn chops on the grill as needed to keep the sugar coating from burning.
Rest pork chops for 3 minutes under loosely tented aluminum foil.