Rinse chops under cold water and pat dry.
Place chops in a large ziplock bag. Set aside.
In a saucepan, combine water, sugar and Kosher salt.
Bring to a boil over high heat and simmer until sugar and salt have completely dissolved.
Remove pan from heat and add ice cubes to the saucepan. Stir until ice has melted and brine is no longer hot.
Pour the cooled brine over pork chops in the ziplock bag. Seal bag squeezing out excess air. Refrigerate chops overnight, for up to 24 hours.
In a small bowl combine spice rub ingredients; paprika, onion powder, garlic powder, cumin, chili powder, dry mustard and pepper.
Remove chops from the brine and pat them dry with a paper towel.
Use your fingers to press the spice rub onto pork chops pressing it into the surface of the chops.
Preheat gas barbecue grill to 350-375℉.
Grill chops (with lid down) for 7-8 minutes on the first side, flip and grill (with lid down) on the second side for another 7-8 minutes, until the pork reaches an internal temperature of 145℉.
Remove caps from heat and allow them to rest for 5-10 minutes before slicing.