GM Service Manual Online
For 1990-2009 cars only

General Specifications

Application

Specification

Metric

English

Rotor Discard Thickness *

27.5 mm

1.08 in

Rotor Thickness (new)

29.0 mm

1.14 in

Rotor Maximum Allowable Lateral Runout

0.125 mm

0.005 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.