Combine steak sauce, oil, pepper, and garlic. Place steak in plastic bag; add marinade, turning to coat. Close bag securely and marinate in refrigerator for at least 1 hour, turning once. Remove steak from marinade; place on rack in broiler pan so surface of meat is 3-4 inches from heat source. Broil 15-18 minutes to desired doneness (rare to medium-rate), turning once.