2009 Chevrolet Suburban 1500 Brake Disc

Brake rotor thickness variation must be checked BEFORE checking for assembled lateral runout (LRO). Thickness variation exceeding the maximum acceptable level can cause brake pulsation. Brake rotor assembled lateral runout (LRO) exceeding the maximum allowable specification can cause thickness variation to develop in the brake rotor over time, usually between 4,800-11,300 km (3,000-7,000 mi). The indexing method of correcting assembled LRO is most effective when the LRO specification is only exceeded by a relatively small amount: 0.025-0.127 mm (0.001-0.005 in). The on-vehicle brake lathe method is used to bring the LRO to within specifications by compensating for LRO while refinishing the brake rotor.

You should ensure that the caliper and caliper bracket that is already being supported, are clear from contacting any rotating components, such as the brake rotor, remove the J-45101-100-washers and the lug nuts that were installed during the assembled LRO measurement procedure and/or the indexing correction procedure, inspect the mounting surface of the hub/axle flange and the brake rotor to ensure that no foreign particles or debris are remaining, set up the lathe, following the manufacturer's instructions, and refinish the brake rotor, following the brake lathe manufacturer's instructions. After each successive cut, inspect the brake rotor thickness. If at any time the brake rotor exceeds the minimum allowable thickness after refinishing specification, the brake rotor must be replaced. After refinishing the brake rotor, you should follow the brake lathe manufacturer's recommended speed setting for applying a non-directional finish and apply non-directional finish.

You should follow the brake lathe manufacturer's recommended speed setting for applying a non-directional finish. Using moderate pressure, you should apply the non-directional finish: if the lathe is equipped with a non-directional finishing tool, you should apply the finish with 120-grit aluminum oxide sandpaper. If the lathe is not equipped with a non-directional finishing tool, you should apply the finish with a sanding block and 150-grit aluminum oxide sandpaper. After applying a non-directional finish, you should clean each friction surface of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner and wipe each friction surface using a clean shop towel to remove metal particles remaining from machining and repeat the cleaning process if necessary to remove all metal particles.

J-41013-Rotor Resurfacing Kit and J-42450-A-Wheel Hub Resurfacing Kit.

You should remove the J-45101-100-washers and the lug nuts that were installed during the assembled LRO measurement procedure, inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining, index the brake rotor in a different orientation to the hub/axle flange, hold the rotor firmly in place against the hub/axle flange and install one of the J-45101-100-washers and one lug nut onto the upper-most wheel stud, install the remaining J-45101-100-washers and lug nuts onto the wheel studs and tighten the nuts firmly by hand in a star-pattern, tighten the lug nuts in a star-pattern to specification, measure the assembled LRO of the brake rotor and compare the amount of change between this measurement and the original measurement.