GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Front Brakes

  • Rotor Discard Thickness*

25.0 mm

0.984 in

  • Rotor Maximum Allowable Lateral Runout

0.16 mm

0.004 in

  • Rotor Maximum Allowable Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.02 mm

0.0005 in

  • Rotor Minimum Allowable Thickness After Resurfacing

26.5 mm

1.043 in

  • Rotor Thickness (new)

28.0 mm

1.102 in

Rear Brakes, Solid Rotors

  • Rotor Discard Thickness*

10.0 mm

0.393 in

  • Rotor Maximum Allowable Lateral Runout

0.10 mm

0.004 in

  • Rotor Maximum Allowable Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.013 mm

0.0005 in

  • Rotor Minimum Allowable Thickness After Refinish

11.0 mm

0.433 in

  • Rotor Thickness (new)

12.0 mm

0.472 in

Rear Brakes, Vented Rotors

  • Rotor Discard Thickness*

18.0 mm

0.709 in

  • Rotor Maximum Allowable Lateral Runout

0.10 mm

0.004 in

  • Rotor Maximum Allowable Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.013 mm

0.0005 in

  • Rotor Minimum Allowable Thickness After Refinish

19.0 mm

0.748 in

  • Rotor Thickness (new)

20.0 mm

0.787 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.