Sierra; 3500 Series; Single Rear Wheel; All; 4.10 Ratio; Code AAVZ. Silverado. A single complete drive axle assembly, used on vehicles that utilize dependent suspension systems, that includes a differential and drive axles to deliver power to the wheels of a vehicle in order to drive the vehicle. Axle Code AAVZ,6444. Limited Slip Differential. Single Rear Wheels. AXLE ASSEMBLY -. Beam Axle Assembly. DIFFERENTIAL carrier. Drive Axle Assembly. Live Axle Assembly. Rigid Axle Assembly. Solid Axle Assembly.