3/4 & 1 ton. Left.DISC BRAKES. Right.DISC BRAKES. W/O SIERRA C3 OR DENALI. 2-Wheel Steering. A Backing Plates used on a drum brake braking system, used to contain brake shoe dust, as well as protect the brake drum components from water, dirt and debris. A Shield used to contain the brake dust produced by the brake pads of a vehicle's disc brake calipers. This typically is mounted to the vehicle's Wheel hub. Additionally, it functions as a splash guard to protect a vehicle's disc brake rotors from water, dirt and debris. Active Brake Control. GVW 9,900 Lbs. Parking Brake. Single Rear Wheels. cover. Brake Dust. Brake Splash Guard. Caliper.