GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Front Brakes

  • Rotor Discard Thickness*

30.7 mm

1.209 in

  • Rotor Maximum Allowable Lateral Runout

0.06 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.025 mm

0.001 in

  • Rotor Minimum Allowable Thickness After Refinishing

31.08 mm

1.223 in

  • Rotor Thickness, New

32.0 mm

1.26 in

Rear Brakes

  • Rotor Discard Thickness*

24.51 mm

0.965 in

  • Rotor Maximum Allowable Lateral Runout

0.06 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.025 mm

0.001 in

  • Rotor Minimum Allowable Thickness After Refinishing

24.89 mm

0.980 in

  • Rotor Thickness, New

25.90 mm

1.020 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.