The procedure is to measure the thinnest point of the brake rotor. If the thinnest point of the brake rotor exceeds the brake rotor minimum thickness, do NOT refinish the brake rotor, use the CH-47661 to refinish the brake rotor, create a non-directional braking surface, and then clean the braking surfaces with GM P/N 12377981 (Canadian P/N 10953463) or equivalent, brake parts cleaner.
By BobGM Specialist
01/11/2022