GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Caliper Bore Diameter

60.0 mm

2.36 in

Rotor Diameter

278.0 mm

10.944 in

Rotor Discard Thickness *

24.7 mm

0.972 in

Rotor Maximum Lateral Runout

0.04 mm

0.0015 in

Rotor Maximum Scoring

1.50 mm

0.059 in

Rotor Minimum Thickness After Refinish

24.9 mm

0.980 in

Rotor Thickness New

26.2 mm

1.031 in

Rotor Thickness Variation

0.025 mm

0.001 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 after refinish specifications.