GM Service Manual Online
For 1990-2009 cars only

General Specifications

Application

Specification

Metric

English

  • Rotor Discard Thickness *

25.6 mm

1.00 in

  • Rotor Thickness (new)

27.0 mm

1.06 in

  • Rotor Maximum Allowable Lateral Runout

0.050 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.050 mm

0.002 in

* All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this specification. After refinishing the rotor, replace any rotor that does not meet the minimum thickness specifications.