Colorado 2WD V8-5.3L (2009)
Brake Rotor/Disc: Testing and Inspection
Brake Rotor Thickness Measurement
Brake Rotor Thickness Measurement
Warning: Refer to Brake Dust Warning (See: Service Precautions/Technician Safety Information/Brake Dust Warning).
1. Clean the brake pad lining contact surface of the brake rotor with denatured alcohol or an equivalent brake cleaner.
2. Using a micrometer calibrated in ten-thousands of an inch, measure and record the lowest thickness of the brake rotor at 4 or more points, equally
spaced around the rotor.
Ensure that the measurements are only taken within the brake pad lining contact area and that the micrometer is positioned the same distance from
the outside edge of the rotor for each measurement.
3. Compare the lowest thickness measurement recorded to the following specifications:
Brake rotor discard thickness 27.5 mm (1.08 in).
4. If the lowest thickness measurement of the brake rotor is above the brake rotor discard thickness specification; the rotor may be able to be
refinished, depending upon surface and wear conditions which may be present.
5. If the lowest thickness measurement of the brake rotor is at or below the discard thickness specification; the rotor requires replacement.
