GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42450-A Wheel Hub Resurfacing Kit

Removal Procedure

The brake rotor can be removed without separating the caliper from the caliper bracket (JC1 System).

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

  3. Object Number: 581489  Size: SH

    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.

  4. Remove the caliper or caliper/bracket assembly and support with heavy mechanics wire or equivalent. DO NOT disconnect the hydraulic brake flexible hose from the caliper. Refer to Front Brake Caliper Replacement .
  5. Remove the brake pads (JC1 System). Refer to Front Disc Brake Pads Replacement .
  6. Remove the caliper bracket. Refer to Front Brake Caliper Bracket Replacement .
  7. Remove and dispose of the sheet metal retainers (JC1 System).
  8. Remove the wheel bearings (JM3 System). Refer to Front Wheel Hub, Bearing, and Seal Replacement in Front Suspension.
  9. Remove the rotor (1).
  10. Inspect and clean all the parts. Replace parts as necessary.
  11. Refinish the rotor if necessary. Refer to Brake Rotor Refinishing .

Installation Procedure

Caution: Do not move the vehicle until a firm brake pedal is obtained. Failure to obtain a firm pedal before moving vehicle may result in personal injury.

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.


    Object Number: 409872  Size: SH
  1. Use the J 42450-A to clean the hub flange (JC1 System).
  2. Install the wheel bearings (JM3 System). Refer to Front Wheel Hub, Bearing, and Seal Replacement in Front Suspension.

  3. Object Number: 581489  Size: SH
  4. Install the rotor (1).
  5. Install the caliper bracket. Refer to Front Brake Caliper Bracket Replacement .
  6. Install the brake pads (JC1 System). Refer to Front Disc Brake Pads Replacement .
  7. Install the caliper. Refer to Front Brake Caliper Replacement .
  8. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  9. Lower the vehicle.