Removal & Installation
Dust and dirt accumulating on brake parts during normal use may contain asbestos fibers from production or aftermarket brake linings. Breathing excessive concentrations of asbestos fibers can cause serious bodily harm. Exercise care when servicing brake parts. Do not sand or grind brake lining unless equipment used is designed to contain the dust residue. Do not clean brake parts with compressed air or by dry brushing. Cleaning should be done by dampening the brake components with a fine mist of water, then wiping the brake components clean with a dampened cloth. Dispose of cloth and all residue containing asbestos fibers in an impermeable container with the appropriate label. Follow practices prescribed by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for the handling, processing, and disposing of dust or debris that may contain asbestos fibers.
- Before servicing the vehicle, refer to the precautions section.
Raise and safely support the rear of the vehicle on jackstands. Block the front wheels.
- Siphon a sufficient quantity of brake fluid from the master cylinder reservoir to prevent the brake fluid from overflowing the master cylinder when removing or installing the brake pads. This is necessary, as the piston must be forced into the cylinder bore to provide sufficient clearance to install the pads.
- Remove the wheel, then reinstall 2 lug nuts finger tight to hold the disc in place.
- Remove the lower mounting bolt from the mounting bracket. Do not remove the caliper main (upper) pin.
- Lift the caliper from the bottom so that it hinges upward on the upper pin. Use a piece of wire to hold the caliper up. Do not allow the brake hose to become twisted or kinked during this operation.
- Remove the brake pads with their shims, springs and support plates.
- Check the rotor thickness.
- Install new pad support plates to the lower sides of the mounting bracket.
- Install new anti-rattle springs to the upper side of the mounting bracket.
- Install a new anti-squeal shim to the back of each pad and install the pads onto the mounting bracket. Install the pads so that the wear indicators are on the uppermost side.
- Use GM tool J-37149, to turn the caliper piston clockwise while pressing it into the caliper bore. Proceed until it locks.
- Lower the caliper so that the pad protrusion fits into the piston stopper groove. Install the mounting bolts and torque to 14 ft. lbs. Install the rear wheel.
- Depress the brake pedal until a firm pedal is obtained.
- Repeat this procedure on the remaining caliper.
- Pump the brakes until a firm pedal is felt. Lower the vehicle and fill the master cylinder reservoir to the correct level.