Tools Required

J 42450-A Hub Cleaning Kit

Caution: Refer to Brake Dust Caution 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, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
4. Remove the tire and wheel. Tire and Wheel Removal and Installation in Tires and Wheels.



5. Install a C-clamp (2) over the top of the brake caliper and against the back of the outboard brake pad.
6. Tighten the C-clamp (2) until the brake caliper piston pushes into the brake caliper bore enough to slide the brake caliper (1) off of the rotor.
7. Remove the C-clamp (2) from the brake caliper.




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.

8. Remove the brake caliper bracket bolts with the brake caliper . Do not disconnect the hydralic brake flex hose from the caliper.



9. Use a strap (2) or heavy gage wire in order to support the brake caliper (1) and the brake caliper bracket.
10. Remove the brake rotor.

1. Clean any corrosion from the brake rotor flange.
2. Use the J 42450-A in order to clean the hub flange.
3. Install the brake rotor.



4. Install the brake caliper bracket with the brake caliper.

Important: To ensure that the proper clamp load will be present when installed. It is imperative that the threads on the caliper bracket bolts, as well as the mounting holes in the knuckle, be cleaned of all debris and inspected before proceeding with installation.

5. Clean and visually inspect threads of the caliper bracket bolts (2) and mounting holes in the knuckle.
6. Apply THREADLOCKER, GM P/N 12345493 (Canadian P/N 10953488), or equivalent to the threads of the brake caliper bracket bolts (2).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

7. Install the caliper bracket bolts.

Tighten
Tighten the brake caliper bracket bolts to 185 N·m (137 lb ft).

8. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation .
9. Lower the vehicle.
10. Fill the master cylinder to the proper level. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.
11. If the brake rotor was refinished, or if a new brake rotor was installed, burnish the brake pads and brake rotors. Refer to Brake Pad and Rotor Burnishing