Yukon 4WD V8-5.3L (2008)
Important: 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. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no foreign particles or debris remaining.
Important: If the rotor was removed using the jack screw method you must ensure that the hub flange is free of nicks or marks caused by
this procedure. Remove all raised nicks or marks before installing the rotor.
3. Align the rotor to its original position on the hub, if applicable, and install the rotor.
4. 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 (See: Testing and
Inspection/Brake Rotor Assembled Lateral Runout Measurement) .
5. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to Brake Rotor Assembled
Lateral Runout Correction (See: Testing and Inspection/Brake Rotor Assembled Lateral Runout Correction) .
6. Install the brake caliper and bracket assembly.
7. Perform the following procedure before installing the caliper bracket mounting bolts.
1. Remove all traces of the original adhesive patch.
2. Clean the threads of the bolts with brake parts cleaner or equivalent and allow to dry.
3. Apply Threadlocker GM P/N 12345493 (Canadian P/N 10953488) to the threads of the bolts.
Notice: Refer to Fastener Notice .
8. Install the brake caliper bracket mounting bolts.
