Fits 4WD; AWDor 8.50/8.625 Ring Gear Saginaw-American Axle; 10 Bolt Diffor Silverado 1500 HD; 9,900 lb Hydraulic Power Brakes, 9.50 RING GEAR SAGINAW-AMERICAN AXLE; 9.50 Ring Gearor 8.50/8.625 Ring Gear Saginaw-American Axle 10 Bolt Diff; EXCEPT MEXICAN(P96); 8.625 Ring Gear