Sprinkle chops with salt and 1 tsp. chili powder. For charcoal grill, cook chops and pineapple on uncovered grill directly over medium coals 6 to 8 minutes, until chops are done (160 degrees F), turning once. (For gas grill, preheat; reduce to medium. Grill chops and pineapple, covered.)
Meanwhile, for chili slaw, in large bowl whisk together vinegar, juice, oil, sugar, and remaining 1/2 tsp. chili powder. Add cabbage, onion, and sweet pepper; toss. Season with salt and pepper. Serve chops with pineapple pieces and slaw. Serves 4.