Prep the cedar plank if needed. Preheat a gas grill to medium-high heat to prepare for indirect grilling.
Mix the sugar and pepper. In a small bowl combine the brown sugar and pepper.
Place the salmon skin-side down on the cedar plank, then spread the brown sugar and black pepper mixture all over the salmon.
Place the plank in the center of the hot grill grates, away from the heat. Cook until salmon is thoroughly cooked through and opaque, about 12 to 15 minutes (depending on the thickness of the salmon).
To serve, cut the salmon into desired portions or serve the salmon on the cedar plank.