Tools Required

1. Release the park brake.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
4. Mark the relationship of the rotor to the hub.
5. Remove the brake caliper bracket mounting bolts.

Notice: 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.

6. 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.
7. Remove the rotor retaining push nuts from the wheel studs (if applicable).
8. 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.



9. 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.



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

10.1.

Assemble J-46277 to J 2619-01 .

10.2.

Insert 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.

10.3.

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

10.4.

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

10.5.

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

Notice: Whenever the brake rotor has been separated from the wheel bearing flange, clean any rust or foreign material from the mating surface of the rotor and flange with the J 42450 hub cleaning kit. Failure to do this may result in increased lateral runout of the rotor and 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. Install the rotor by slowly turning the rotor while pushing the rotor towards the axle.
4. Install the caliper and the bracket as an assembly to the vehicle.
5. Perform the following procedure before installing the caliper bracket mounting bolts.

•	Remove all traces of the original adhesive patch.

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

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

Notice: Refer to Fastener Notice in the Preface section.

6. Install the caliper bracket mounting bolts.

Tighten
Tighten the brake caliper bracket mounting bolts to 175 N·m (129 lb ft).

7. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
8. Lower the vehicle.
9. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of it's travel distance.
10. Slowly release the brake pedal.
11. Wait 15 seconds, then repeat steps 9-10 until a firm pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
12. Fill the master cylinder reservoir to the proper level with clean brake fluid. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.