GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Front Brakes:

  • Caliper Bore Diameter

60.0 mm

2.36 in

  • Discard Thickness*

24.7 mm

0.972 in

  • Minimum Rotor Thickness After Refinish

24.9 mm

0.980 in

  • Rotor Thickness New

26.2 mm

1.031 in

Maximum Lateral Runout

0.04 mm

0.0015 in

Maximum Scoring

1.50 mm

0.059 in

Rotor Diameter

278.0 mm

10.944 in

Thickness Variation

0.025 mm

0.001 in

Rear Brakes:

  • Caliper Bore Diameter

38.0 mm

1.50 in

  • Discard Thickness*

9.0 mm

0.354 in

  • Minimum Rotor Thickness After Refinish

9.85 mm

0.388 in

  • Rotor Thickness New

11.0 mm

0.433 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 specification.