OEM GMC Yukon XL 2500 Brake Disc

GMC Yukon XL 2500 Brake Disc Parts and Q&A

• Rotor, Front
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  Q: How to Service and Repair the Front Brake Disc Using the J41013 and J42450-A Kits on GMC Yukon XL 2500?

  A:

  The service and repair of brake discs requires the usage of J41013 Rotor Resurfacing Kit (J41013) and J42450-A Wheel Hub Resurfacing Kit (J42450-A). The brake system requires no disc brake disc refinishing during regular maintenance while new discs should be free of this practice. Refinishing operations must be rare since they only benefit discs which maintain sound thickness with additional conditions beyond permissible specifications. Clean the hub/axle flange along with the brake disc mating surfaces from any dust and rust by adopting the J42450-A method then proceed with the J41013 on the disc itself. The brake disc should be mounted to the brake lathe while maintaining cleanliness on all attachments. Bring the cutting tools to meet disc friction surfaces during lathe operation while checking the witness mark to verify correct mounting. The manufacturer guidelines for the lathe should be followed to restore the disc shape while checking the material reduction after every cutting iteration. Brake discs need replacement when refinishing results in a disc that surpasses the specified minimum thickness. For a non-directional finish select the recommended grit sandpaper available for the lathe equipment then remove dust from friction surfaces by using denatured alcohol or an approved brake cleaner. The LRO measurement of the assembled brake disc must be completed for performance verification. Necessary adjustments should be made if the measurement surpasses established specifications.
• Rotor, Front
  15942198
  Q: How to replace the front brake disc on GMC Yukon XL 2500?

  A:

  Before starting you must lift your vehicle then take off its tire and wheel parts together. Make any necessary marks on the disc to its connection with the hub before using a c-clamp to compress the brake caliper pistons for removal. You must suspend the caliper on mechanic's wire to shield the hydraulic brake hose from damage. First take out the complete brake caliper assembly including its bracket. Then detach the disc holding push nuts depending on the vehicle design. When corrosion makes the disc difficult to detach use penetrating oil to clean both parts before inserting m10x1.5 bolts through the disc threaded holes and tightening them to separate the disc from the hub. Before fitting clean the hub flange with wheel hub resurfacing kit (J42450-A) and clean the inside Brake Disc diameter using rotor resurfacing kit (J41013). Surface cleaning comes first then position the disc back where it belongs. When fitting the disc to a brake system repair check lro assembly and fix if it is off standard. Fix the caliper and bracket together by cleaning all bolt threads first then applying threadlocker gm p/n 12345493 (Canadian P/N 10953488) before tightening bracket mounting bolts using the correct torque. After installing the wheel and tire set down the vehicle. Apply and release the brake pedal to position the caliper pistons correctly and fill the brake fluid reservoir with fresh brake fluid.