GM Service Manual Online
For 1990-2009 cars only

    Note: Brake rotor thickness variation greater than the specification can cause brake pulsation.

  1. Measure the brake rotor thickness variation. Refer to Brake Rotor Thickness Variation Measurement.

  2. Object Number: 693343  Size: SH

    Note: Brake rotor assembled lateral runout (LRO) greater than the specification can cause brake pulsation.

  3. Measure the brake rotor LRO. Refer to Brake Rotor Assembled Lateral Runout Measurement.
  4. If the LRO exceeds the specification by less than 0.127 mm (0.005 in), index the rotor in order to reduce the LRO to the specification. Refer to Brake Rotor Assembled Lateral Runout Correction - Indexing.
  5. If the LRO exceeds the specification by more than 0.127 mm (0.005 in), use an on-vehicle lathe in order to reduce the LRO to the specification. Refer to Brake Rotor Assembled Lateral Runout Correction - On Vehicle Lathe.