Vehicle maintenance starts with checking the brake master cylinder reservoir fluid before you move to change the front Brake Disc on a 2500 series vehicle. Lower the reservoir fluid to reach the midway point when it exceeds that level. First support your vehicle and then remove its tire and wheel assembly. Note all positions to install your original Brake Disc in relation to the hub. Use two big c-clamps to compress brake caliper pistons while upholding the caliper with heavy mechanic wire during this procedure to avoid breaking the brake hose. Use a socket wrench to remove the two
Brake Caliper Bracket mounting bolts then lift the assembly apart from the caliper bracket. First eliminate the disc retaining push nuts and then strike the disc between wheel studs with a deadblow hammer to remove it from the hub if necessary. To separate non-separable discs wash them thoroughly while applying penetrating oil then secure the disc off with two m10 x 1.5 bolts. Use the j-42450-a - wheel hub resurfacing kit to clean the hub flange mating surface while making sure it stays completely free of debris. Position the disc before installing it and fasten back the brake caliper with its bracket assembly. Following cleaning of the caliper bracket mounting bolts threads apply threadlocker gm p/n 12345493 before torquing each bolt to 300 nm (221 lb ft). After reinstalling the tire and wheel assembly you should apply the brake pedal slowly until it reaches 2/3 of its full travel repeatedly until the pedal pressure becomes firm. Complete the process by placing clean brake fluid into the master cylinder and perform
Brake Pad and disc burnishing for replacement or refinished discs.