Rear Brake Rotor Replacement With Single Rear Wheel

Special Tools

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

1. Release the park brake.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
4. Mark the relationship of the rotor to the hub.
5. Install a C-clamp over the body of the brake caliper, with the C-clamp ends against the rear of the caliper body and the outboard disc brake pad.
6. Slowly tighten the C-clamp until the pistons are pushed into the caliper bores enough to remove the caliper from the pads.
7. Remove the C-clamp from the caliper.
8. Remove the brake caliper bracket mounting bolts.

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. Remove the brake caliper and brake caliper bracket as an assembly and support with heavy mechanic's wire or equivalent. DO NOT disconnect the hydraulic brake flexible hose from the caliper.
10. Remove the rotor retaining push nuts from the wheel studs, if applicable.
11. It may be necessary to strike the end of the hub or the rotor with a deadblow hammer to separate the rotor from the hub.



12. Remove the brake rotor. Do not force the rotor off. If the rotor is difficult to remove, ease it off by gently rotating it as you pull outward.



13. If the brake rotor cannot be removed perform the following:

13.1.

Assemble the J-46277 to the J 2619-01 .

13.2.

Insert the J-46277 between the rotor friction surfaces in the vent section of the rotor. DO NOT place the J-46277 on the rotor friction surface.

13.3.

Using the J-46277 and the J 2619-01 , remove the rotor from the hub assembly.

13.4.

Inspect the park brake components for the following conditions:

•	Bent or broken hold down spring

•	Broken, cracked or worn brake shoe lining

•	Bent or damaged brake shoe

•	Worn, bent or damaged backing plate

13.5.

If any of these conditions are found replace the affected parts.

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. Use the J 42450-A to clean all rust and contaminants from the mating surface of the hub flange.
2. Use the J 41013 to clean all rust and contaminants from the inside diameter of the hat section of the brake rotor to prevent any foreign material from getting between the brake rotor and the hub flange.
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. Align the rotor to its original position on the hub, if applicable, and install the rotor.
5. 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.
6. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to Brake Rotor Assembled Lateral Runout Correction.



7. Install the rotor by slowly turning the rotor while pushing the rotor towards the axle.



8. Install the caliper and the bracket as an assembly to the vehicle.
9. Perform the following procedure before installing the caliper bracket mounting bolts.

9.1.	Remove all traces of the original adhesive patch.

9.2.	Clean the threads of the bolt with brake parts cleaner or the equivalent and allow to dry.

9.3.	Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488) to the threads of the bolt.

Caution: Refer to Fastener Caution in the Preface section.

10. Install the caliper bracket mounting bolts.

•	JH5: Tighten the bolts to   200 N·m (148 lb ft).

•	JH6, JH7: Tighten the bolts to  165 N·m (123 lb ft).

11. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
12. Lower the vehicle.
13. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.
14. Slowly release the brake pedal.
15. Wait 15 seconds, then repeat steps 13-14 until a firm pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
16. Fill the master cylinder reservoir to the proper level with clean brake fluid. Refer to Master Cylinder Reservoir Filling.

Rear Brake Rotor Replacement With Dual Rear Wheel

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

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.

Note: Do not remove the brake caliper guide pins unless replacement is required.




3. Remove the brake caliper bracket bolts (1).



4. Remove the brake caliper and bracket assembly (1) and support with heavy mechanics wire or equivalent.
5. Remove the rear axle shaft and hub. Refer to Rear Axle Hub, Bearing, Cup, and/or Seal Replacement.

It is not necessary to remove the bearings and cups from the hub unless replacement is required.




6. Remove the brake rotor and hub assembly (1) from the rear axle.



7. Mark the relationship of the hub to the rotor.
8. Using a hydraulic press, press the wheel studs (1) from the hub and rotor assembly.



9. Separate the hub (1) from the brake rotor.
10. Using a stiff brush, clean any loose debris and corrosion from the mating surfaces of the brake rotor and the rear axle hub.

1. Install the hub (1) to the brake rotor.



2. Install the rear axle hub to the brake rotor.

Align the matchmarks on the rear axle hub to the brake rotor.

3. Using a hydraulic press, press the wheel studs (1) in the hub and rotor assembly.
4. Prepare the brake caliper bracket bolts and the rear axle threaded holes for assembly.

•	Clean the brake caliper bracket bolts of any threadlocking residue

•	Clean the rear axle threaded holes of any threadlocking residue with denatured alcohol and allow to dry

5. Apply threadlocker GM P/N 89021297 (Canadian P/N 10953488) to 2/3 of the threaded length of the brake caliper bracket bolt.
6. Allow the threadlocker to cure approximately 10 minutes before assembly.



7. Position the brake caliper and bracket assembly (1) to the rear axle.

Caution: Refer to Fastener Caution in the Preface section.




8. Install the brake caliper bracket bolts (1) and tighten to  300N·m (221 lb ft).
9. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.