GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Front Brakes - FWD

  • Rotor Thickness - NEW

32.2 mm

1.27 in

  • Rotor Discard Thickness*

30.7 mm

1.21 in

  • Rotor Maximum Allowable Assembled 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 Refinish

31.08 mm

1.22 in

Front Brakes - AWD

  • Rotor Thickness - NEW

30.0 mm

1.181 in

  • Rotor Discard Thickness*

27.0 mm

1.063 in

  • Rotor Maximum Allowable Assembled 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 Refinish

28.4 mm

1.118 in

Rear Brakes

  • Rotor Thickness - NEW

11.0 mm

0.433 in

  • Rotor Discard Thickness*

9.0 mm

0.354 in

  • Rotor Maximum Allowable Assembled 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 Refinish

10.0 mm

0.39 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.