GM 22705357
Backing Plate, Green Line, Rear

Before replacing the drum Brake Backing Plate start by taking off the Brake Drum while observing brake dust protocols. Position a jack stand or appropriate support fixture under the lower Control Arm before removing the brake shoes together with the universal spring. Detach abs wheel speed sensor connector and upper Control Arm Bolt before positioning the arm so it created a safe distance from brake hose to Wheel Cylinder linkage. Use 2 copper gaskets to remove the brake hose banjo bolt then apply caps or plugs to protect the exposed brake hose from leaking while preventing contamination. Take out the bolts securing the Wheel Cylinder to the backing plate assembly to remove the Wheel Cylinder from its location. You must disconnect the park brake cable from both the park brake lever and backing plate through pulling open the locking tabs. Secure the Wheel Bearing, backing plate assembly, and spacer plate to the knuckle by removing the 4 nuts before separating the assembly. Take the plugs off of the backing plate assembly. Installation begins by inserting backing plate plugs into the new assembly before mounting the Wheel Bearing and backing plate assembly and spacer plate onto the knuckle using 4 nuts torqued to 47 ft. Lbs (63 Nm). Connect the park brake cable to the backing plate assembly until two locking tabs engage before fixing it to the park brake lever. Install the Wheel Cylinder onto the backing plate assembly before tightening its mounting bolts to 10 nm (89 inch lbs.). Seal the brake hose end by replacing the cap or plug followed by installing the brake hose banjo bolt and two new copper gaskets. Tighten the banjo bolt to 50 nm (37 ft. Lbs.). Install the upper Control Arm Bolt followed by the nut before tightening it to 180 nm (133 ft. Lbs.) when abs is present. Replace the universal spring and brake shoes before removing the lower Control Arm assembly support fixture and jack stand. The mechanic will need to adjust the drum brakes followed by installing the Brake Drum while performing brake hydraulic system bleeding and lowering the vehicle for rear alignment inspection.

Install the wheel cylinder and the universal spring to the backing plate, followed by the brake shoes.

Install the wheel cylinder and the universal spring to the backing plate.

Install the wheel cylinder and the universal spring to the backing plate.

The wheel cylinder.

First, raise and support the vehicle.

Follow by installing the rear wheel bearing and hub assembly.

Disconnect the wheel speed sensor connector and remove the upper control arm bolt, positioning the upper control arm away from the brake hose to wheel cylinder connection.