Uplander FWD V6-3.5L VIN L (2006)
3. Using a micrometer calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch, measure and record the thickness of the brake rotor at
four or more points, evenly spaced around the rotor. Ensure that the measurements are only taken within the friction surfaces and that the
micrometer is positioned the same distance from the outer edge of the rotor, about 13 mm (0.5 inch), for each measurement.
4. Calculate the difference between the highest and lowest thickness measurements recorded to obtain the amount of thickness variation.
5. Compare the thickness variation measurement to the following specification:
Brake rotor maximum allowable thickness variation: 0.025 mm (0.001 inch)
6. Important: Whenever a brake rotor is refinished or replaced, the assembled lateral runout (LRO) of the rotor must be measured to ensure
optimum performance of the disc brakes.
If the brake rotor thickness variation measurement exceeds the specification, the rotor requires refinishing or replacement.
