GM 15134671
Rotor

First check brake fluid levels in the master cylinder. If fluid stands at least halfway between top and bottom marks remove it. Raise the vehicle and remove the tire and wheel assembly. Apply a large c-clamp (specific brand not required) onto the brake caliper housing to push back the pistons until you can uninstall the caliper. Take off the rear brake caliper mounting bracket and brakes disc retaining clips. You need both tools slide hammer (J 2619-01) and rotor removal tool (J 46277) to extract the fixed Brake Disc from the hub assembly by inserting the tool through its friction surfaces. Before taking out the Brake Disc check and clean its related mating parts from rust and unwanted debris. To prepare the contact area for resurfacing use the Wheel Hub resurfacing kit (J 42450-A) before checking the park brake parts for damage. Use denatured alcohol to clean park brake shoes before blowing them dry with non-oil filtered air. Apply high-temperature silicone brake oil directly to the contact zone. Readjust the park brake according to marks when installing it directly onto the axle flange. Press the Brake Disc onto the axle as you turn it and then reinstall all parts including the mounting bracket, tire, wheel, and lower the vehicle. Put fluid into the brake master cylinder when needed then press the brake pedal to position brake pads before finishing the replaced or renewed brake discs.

Reinstall the rear brake caliper mounting bracket, the tire and wheel assembly, and lower the vehicle.

Measure the thinnest point of the brake rotor with a micrometer; if it exceeds the minimum thickness, replace the brake rotor instead of refinishing it.

Install the brake rotor by turning it while pushing it onto the axle flange.

Ensure the relationship marks on the rotor and wheel stud are aligned.

Mark its orientation relative to a wheel stud before removal.

Approximately 20 stops should be completed.

The J 41013 Rotor Resurfacing Kit (J 41013) and the J 42450-A Wheel Hub Resurfacing Kit (J 42450-A).

Install the brake rotor by turning it while pushing it onto the axle flange, followed by the rear brake caliper mounting bracket, and then reinstall the tire and wheel assembly.

Measure the thinnest point of the brake rotor with a micrometer; if it exceeds the minimum thickness, replace the brake rotor instead of refinishing it.

Raise the vehicle and remove the tire and wheel assembly.

Begin by using the Wheel Hub Resurfacing Kit (J 42450-A) to clean the wheel bearing/hub.

Inspect the brake fluid level in the brake master cylinder reservoir; if it is above the midway point, remove excess fluid to reach that point.

Remove the brake rotor and clean the contact area using the Wheel Hub Resurfacing Kit (J 42450-A). If necessary, refinish the rotor.

Clean the braking surfaces with GM P/N 12377981 (Canadian P/N 10953463) or an equivalent brake parts cleaner.

Use 120 grit aluminum oxide sandpaper and a non-directional rotor finisher if available.

Use the J-42450-A (Wheel Hub Resurfacing Kit) for the hub/axle flange and the J-41013 (Rotor Resurfacing Kit) for the rotor.

Install the brake caliper bracket bolts and tighten them to 160 Nm (118 lb ft).

Mark its relationship to a wheel stud before removing it from the wheel hub.

Clean the brake rotor contact area on the front hub with the Wheel Hub Cleaning Kit (J 42450-A).

Remove the mounting bolts from the brake caliper mounting bracket and take off the brake caliper and mounting bracket assembly.

Inspect the park brake components for any damage and replace as needed.

Begin by using the Wheel Hub Resurfacing Kit (J 42450-A) to clean the wheel bearing/hub.