Prepare a charcoal grill for direct cooking over medium-high heat.
For the pickles: Drain and place the pickles in a large mixing bowl (keep the jar). In the jar, add the sugar, red pepper flakes, hot sauce and garlic. Stir and let stand until the sugar dissolves. Put the pickles back into the jar and refrigerate until needed.
In a large mixing bowl, combine the onion salt, sugar, garlic powder, pepper, chili pepper, cumin and coriander. Use the mixture to season the chicken on all sides.
Warm up the KC Masterpiece® sauce in a medium-size saucepan over low heat.