Rear Brake Rotor Replacement JE5, J55

Special Tools

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

1. Block the rear drive wheels.
2. Release the electronic park brake cable tension, if equipped. Refer to Parking Brake Cable Adjuster Disabling.
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
4. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.



5. Remove the upper brake caliper bracket bolt (1).
6. Remove the lower brake caliper bracket bolt (2).

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.




7. Remove the brake caliper and bracket assembly (1) and support with heavy mechanics wire or equivalent.



8. Matchmark the position of the brake rotor to the wheel studs.
9. Remove the brake rotor screw (1).
10. Remove the brake rotor.

Note: Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of the brake rotor, which could lead to brake pulsation.

1. Using the J-42450-A Wheel Hub Resurfacing Kit , thoroughly clean any rust or corrosion from the mating surface of the hub/axle flange.
2. Using the J-41013 Rotor Resurfacing Kit , thoroughly clean any rust or corrosion from the mating surface and mounting surface of the brake rotor.
3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no foreign particles or debris remaining.



4. Install the brake rotor to the hub/axle flange. Use the matchmark made prior to removal for proper orientation to the flange.

Caution: Refer to Fastener Caution in the Preface section.

5. Install the brake rotor screw (1) and tighten to  12 N·m (106 lb in).
6. If the brake rotor was removed and installed as part of a brake system repair, measure the assembled lateral runout (LRO) of the brake rotor to ensure optimum performance of the disc brakes. Refer to Brake Rotor Assembled Lateral Runout Measurement.
7. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to Brake Rotor Assembled Lateral Runout Correction.

Note: If reusing the caliper bracket bolts the threads of the caliper bracket bolts and the threads of the knuckle mounting holes must be free of residue and debris prior to application of threadlocker in order to ensure proper adhesion and fastener retention.

8. Prepare the bolts and the threaded holes for assembly:

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

•	Thoroughly clean the residue from the threaded holes by using denatured alcohol or equivalent and allow to dry.

•	Apply threadlocker GM P/N 12345493 (Canada P/N 10953488), or equivalent to 2/3 of the threaded length of the lower caliper bracket bolts. Ensure there are no gaps in the threadlocker along the length of the filled area of the bolts.

•	Allow the threadlocker to cure approximately 10 minutes before installation.




9. Install the brake caliper and bracket assembly (1).



10. Install the upper brake caliper bracket bolt (1) and tighten to  135 N·m (100 lb ft).
11. Install the lower brake caliper bracket bolt (2) and tighten to  135 N·m (100 lb ft).
12. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
13. Set the electronic park brake cable tension. Refer to Parking Brake Cable Adjuster Enabling.
14. If the brake rotor was refinished or replaced, or if new brake pads were installed, burnish the pads and rotors. Refer to Brake Pad and Rotor Burnishing.

Rear Brake Rotor Replacement J56

Special Tools

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

1. Block the rear drive wheels.
2. Release the electronic park brake cable tension, if equipped. Refer to Parking Brake Cable Adjuster Disabling.
3. Turn the ignition to the OFF position.
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. If reinstalling the brake rotor, match mark the brake rotor relationship to the wheel hub.



7. Remove the brake caliper bolts (1).

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.

8. Remove the brake caliper and support with heavy mechanics wire or equivalent.



9. Remove the brake rotor screw (1).
10. Remove the brake rotor (2).
11. If the brake rotor cannot be removed, perform the following:

11.1.

Assemble the  J-2619-A Slide Hammer w/Adapter to the  J-46277 Rotor Removal Tool .

11.2.

Insert the  J-46277 Rotor Removal Tool between the rotor friction surfaces in the vent section of the brake rotor.

Do not place the J-46277 Rotor Removal Tool on the friction surface of the brake rotor.

11.3.

Using the  J-2619-A Slide Hammer w/Adapter and the  J-46277 Rotor Removal Tool , remove the brake rotor from the wheel hub assembly.

12. Inspect the park brake components for the following conditions:

•	Bent or broken hold down springs

•	Broken, cracked, or worn park brake shoe lining

•	Bent or damaged park brake shoe

•	Worn, bent, or damaged parking brake backing plate

13. If any of the above listed conditions are found, repair or replace the damaged park brake components.

Note: Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of the brake rotor, which could lead to brake pulsation.

1. Using the J-42450-A Wheel Hub Resurfacing Kit , thoroughly clean any rust or corrosion from the mating surface of the hub/axle flange.
2. Using the J-41013 Rotor Resurfacing Kit , thoroughly clean any rust or corrosion from the mating surface and mounting surface of the brake rotor.



3. Install the brake rotor screw (1) and the brake rotor (2).

Align the match mark made prior to the brake rotor removal, if necessary.

Caution: Refer to Fastener Caution in the Preface section.

4. Tighten the brake rotor screw to  12 N·m (106 lb in).

Note: If reusing the brake caliper to knuckle mounting bolts the threads of the bolts and the threads of the knuckle mounting holes must be free of residue and debris prior to application of threadlocker in order to ensure proper adhesion and fastener retention.

5. Prepare the bolts and the threaded holes for assembly:

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

•	Thoroughly clean the residue from the threaded holes by using denatured alcohol or equivalent and allow to dry.

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



9. Install the brake caliper bolts (1) and tighten to  130 N·m (96 lb ft).
10. If the brake rotor was removed and installed as part of a brake system repair, measure the assembled lateral runout (LRO) of the brake rotor to ensure optimum performance of the disc brakes. Refer to Brake Rotor Assembled Lateral Runout Measurement.
11. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to Brake Rotor Assembled Lateral Runout Correction.
12. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
13. Set the electronic park brake cable tension. Refer to Parking Brake Cable Adjuster Enabling.
14. If the brake rotor was refinished or replaced, or if new brake pads were installed, burnish the brake pads and rotors. Refer to Brake Pad and Rotor Burnishing.