GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Front Brakes

  • Rotor Discard Thickness

28.6 mm

1.126 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 Thickness Variation

0.025 mm

0.001 in

  • Rotor Minimum Allowable Thickness after Refinishing

29.0 mm

1.142 in

  • Rotor Thickness - New

30 mm

1.181 in

Rear Brake Rotors

  • 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 Refinishing

9.35 mm

0.368 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 specification.