Rear Disc Brake Pads Replacement JE5, J55

Warning: Refer to Brake Dust Warning in the Preface section.

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum full point and the minimum allowable level, no brake fluid needs to be removed from the reservoir before proceeding.
3. If the brake fluid level is higher than midway between the maximum full point and the minimum allowable level, remove brake fluid to the midway point before proceeding.
4. Release the electronic park brake cable tension, if equipped. Refer to Parking Brake Cable Adjuster Disabling.
5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
6. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
7. Install a C-clamp against the outer brake pad and the rear of the brake caliper body.
8. Slowly tighten the C-clamp until the brake caliper pistons are compressed into the brake caliper bores.




Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

9. Using a backup wrench on the brake caliper guide pin, remove the upper brake caliper guide pin bolt (1).



10. Pivot the brake caliper (1) forward and support with heavy mechanics wire or equivalent.



11. Remove the inner brake pad (1).
12. Remove the outer brake pad (2).



13. Remove the brake pad springs (1).

1. Inspect the brake caliper guide pins, seals and brake pad springs for damage and/or corrosion. Refer to Front Disc Brake Mounting and Hardware Inspection.



2. Install the brake pad springs (1).



3. Install the inner brake pad (1).
4. Install the outer brake pad (2).



5. Pivot the brake caliper (1) into position.

Note: If reusing the brake caliper guide pin bolt, the threads of the brake caliper guide pin bolt and the threads of the guide pin must be free of residue and debris prior to application of threadlocker in order to ensure proper adhesion and fastener retention.

6. If reusing the caliper pin bolt, prepare the bolt and the guide pin for assembly:

•	Thoroughly clean the residue from the guide pin bolt threads by using denatured alcohol or equivalent and allow to dry.

•	Thoroughly clean the residue from the guide pin threads by using denatured alcohol or equivalent and allow to dry.

7. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488), or equivalent to 2/3 of the threaded length of the brake caliper guide pin bolt. Ensure there are no gaps in the threadlocker along the length of the filled area of the bolt.
8. Allow the threadlocker to cure approximately 10 minutes before installation.

Caution: Refer to Fastener Caution in the Preface section.




9. Using a backup wrench on the brake caliper guide pin, install the brake caliper guide pin bolt (1) and tighten to  60 N·m (44 lb ft).
10. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
11. With the engine OFF, gradually apply the brake pedal to approximately  2/3 of its travel distance.
12. Slowly release the brake pedal.
13. Wait 15 seconds, then repeat steps 11 and 12 until a firm brake pedal apply is obtained. This will properly seat the brake caliper pistons and brake pads.
14. Fill the brake master cylinder reservoir to the proper level. Refer to Master Cylinder Reservoir Filling.
15. Set the electronic park brake cable tension, if equipped. Refer to Parking Brake Cable Adjuster Enabling.
16. Burnish the pads and rotors. Refer to Brake Pad and Rotor Burnishing.

Rear Disc Brake Pads Replacement J56

Warning: Refer to Brake Dust Warning in the Preface section.

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum full point and the minimum allowable level, no brake fluid needs to be removed from the reservoir before proceeding.
3. If the brake fluid level is higher than midway between the maximum full point and the minimum allowable level, remove brake fluid to the midway point before proceeding.
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.



6. Remove the lower brake pad guide pin (1).



7. Remove the brake pad spring (1).



8. Remove the upper brake pad guide pin (1).



9. Remove the brake pads (1).
10. Using a spreader tool, carefully push the brake caliper pistons into the caliper bores until fully seated.

1. Inspect the brake pad guide pins. If damaged, or corroded replace the guide pin. Do not attempt to clean away any corrosion.
2. Inspect the brake caliper piston boot for damage and/or deterioration, replace if damaged or deteriorated. Refer to Brake Caliper Inspection.



3. Install the brake pads (1).



4. Install the upper brake pad guide pin (1).

Ensure the brake pad guide pin is fully seated in the brake caliper housing.




5. Install the brake pad spring (1).



6. Install the lower brake pad guide pin (1) through the brake caliper and over the edge of the brake pad spring.

Ensure the brake pad guide pin is fully seated in the brake caliper housing.

7. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
8. With the engine OFF, gradually apply the brake pedal to approximately  2/3 of its travel distance.
9. Slowly release the brake pedal.
10. Wait 15 seconds, then repeat steps 8 and 9 until a firm brake pedal apply is obtained; this will properly seat the brake caliper pistons and brake pads.
11. Fill the brake master cylinder reservoir to the proper level. Refer to Master Cylinder Reservoir Filling.
12. Burnish the brake pads and rotors. Refer to Brake Pad and Rotor Burnishing.