Loosen the rear wheel lug nuts, raise the rear of the vehicle, and support it securely on jackstands. Block the front wheels and remove the rear wheels. Release the parking brake. Remove the rear calipers. Support the caliper assemblies with a coat hanger or heavy wire and don't disconnect the 
Brake Line from the caliper. Remove the rear discs. Remove the rear hub and bearing assemblies. Clean the parking brake assembly with brake system cleaner. Replace the parking brake shoes. Clean the backing plate, then apply a thin coat of high-temperature grease to the shoe contact points on the backing plate. Clean and lubricate the threads of the adjuster screw assembly. Mount the trailing shoe on the backing plate, making sure the notch in the shoe engages with the actuator lever, and secure the shoe with the hold-down spring and pin. Connect the upper return springs to the top of the trailing shoe and to the top of the leading shoe. Place the leading shoe in position and secure the shoe with the hold-down spring and pin. Install the lower return spring. Spread the shoes apart and install the adjuster screw assembly. Inspect the drum surface inside the disc for score marks, deep grooves, hard spots, and cracks. If the disc/drum is worn, scored, or out of round, it will have to be resurfaced by an automotive machine shop or replaced. Install the hub and bearing assemblies. Install the disc/drum over the shoes. Using a screwdriver, turn the star wheel on the parking brake shoe adjuster until the shoes slightly drag as the disc is turned, then back off the adjuster until the shoes don't drag. Install the caliper. Repeat this sequence on the parking brake shoes for the other rear wheel.