Brake Pads Replacement - Rear

Brake Pads Replacement - Rear

Removal Procedure

Caution: Avoid taking the following actions when you service wheel brake parts:
^ Do not grind brake linings.
^ Do not sand brake linings.
^ Do not clean wheel brake parts with a dry brush or with compressed air.
Some models or aftermarket brake parts may contain asbestos fibers which can become airborne in dust. Breathing dust with asbestos fibers may cause serious bodily harm. Use a water-dampened cloth in order to remove any dust on brake parts. Equipment is available commercially in order to perform this washing function. These wet methods prevent fibers from becoming airborne.

1. Use a siphon in order to remove half of the brake fluid from the master cylinder reservoir.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Remove the tire and wheel assembly from the vehicle. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

Important: Use care when removing the clip and the springs in order to re-use the components.

4. Use a flat blade tool in order to remove the clip (1).
5. Use a flat blade tool in order to remove the springs (1 ,2).
6. Remove the pad guide pins (5,6).
7. Remove the brake pads (2,3) with the insulators (1,4).
8. Remove the insulators from the pads.

Inspection Procedure
1. Inspect the brake pads for wear. If the pad thickness is less than the specification, replace the disc brake pads in axle sets.
Specification
The minimum brake pad lining thickness is 1 mm (0.039 in).
2. Clean the clip (8) and the springs (7,9). Inspect the components for the following conditions:
^ Sufficient rebound
^ No deformation
^ No cracks
^ No wear
^ No rust
^ No dirt
If the components meet the above conditions, re-use the components.
3. Inspect the disc brake hardware. Replace components if necessary. Refer to Disc Brake Mounting and Hardware Inspection - Rear. Inspection - Rear
4. Inspect the caliper. Repair or replace components as necessary. Refer to Brake Caliper Inspection.

Important: Refinish or replace the rotor ONLY if the condition of the rotor requires service. DO NOT retinish the rotor it the brake pads are the only components requiring service.

5. Measure the brake rotor thickness. Refinish or replace the rotor as necessary. Refer to Brake Rotor Thickness Measurement. Brake Rotor Thickness Measurement
6. Measure the brake rotor thickness variation Refinish or replace the rotor as necessary. Refer to Brake Rotor Thickness Variation Measurement. Brake Rotor Thickness Variation Measurement
7. Inspect the surface of the brake rotor. Refinish or replace the rotor as necessary. Refer to Brake Rotor Surface and Wear Inspection. Brake Rotor Surface and Wear Inspection
8. Measure the brake rotor assembled lateral runout. Refinish or replace the rotor as necessary. Refer to Brake Rotor Assembled Lateral Runout (LRO) Measurement. Brake Rotor Assembled Lateral Runout (LRO) Measurement

Installation Procedure
1. If the caliper piston (13) is not compressed into the caliper bore, complete the following:
1.1. Wrap the handle of a hammer with tape.
1.2. Use the handle of a hammer in order to compress the caliper piston into the caliper bore.
2. Apply disc brake insulator silicone lubricant, GM P/N 1801908, or an equivalent lubricant, to the pad side of a new inner pad insulator (1).
3. Install the inner pad insulator to the inner pad (2).
4. Install the inner brake pad to the caliper with the wear indicator facing upward
5. Apply disc brake insulator silicone lubricant, GM P/N 1801908, or an equivalent lubricant, to the pad side of a new outer pad insulator (8).
6. Install the outer pad insulator to the outer pad (3).
7. Install the outer brake pad to the caliper.
8. Install the springs (7,9) to the pads.
9. While pressing the inner spring (1), install the upper pad guide pin (2) and the lower pad guide pin.
10. Install the clip to the pad guide pin.
11. Install the tire and wheel assembly to the vehicle. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
12. Lower the vehicle.
13. With the engine OFF, gradually apply and release the brake pedal several times in order to position the caliper pistons and the brake pads.
14. Fill the master cylinder fluid reservoir. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes. Master Cylinder Reservoir Filling
15. Burnish the pads and the rotors. Refer to Burnishing Pads and Rotors. Burnishing Pads and Rotors