Rub Seasoning over beef. Place beef, fat side up, in 13x9-inch foil pan. Cover with foil. Refrigerate overnight.
Prepare grill for indirect medium-low heat (275 degrees F to 300 degrees F). Preheat grill by turning all burners to high. Turn burner on 1 side to medium-high. Turn off burner(s) on other side. Place covered beef in pan on unlit side of grill. Close grill.
Grill 2 1/2 to 3 hours or until internal temperature of thickest part of beef is 180 degrees F to 185 degrees F. Carefully remove pan from grill.
Return beef to grill, placing it directly on unlit side. Cook 30 minutes longer or until beef forms a crust and internal temperature is 190 degrees F to 200 degrees F.
Remove beef from grill. Let stand 10 minutes. Slice brisket. Serve brisket slices on slider rolls. Top with barbecue sauce and coleslaw.