Sprinkle brisket on all sides with garlic salt and pepper. Wrap in heavy aluminum foil, leaving a hole in top of foil. Place brisket on grill over low coals. Cover grill; open vent. Cook 2 hours and 15 minutes or until meat is very tender.
Transfer brisket to a warm platter; cut diagonally across the grain into thin slices. Serve with Panhandle Barbecue Sauce.