GM Service Manual Online
For 1990-2009 cars only

General Specifications

Application

Specification

Metric

English

Front Brakes

  • Rotor Minimum Thickness *

27.5 mm

1.08 in

  • Rotor Thickness (new)

29.0 mm

1.14 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

Rear Brakes

  • Rotor Minimum Thickness *

18.4 mm

0.72 in

  • Rotor Thickness (new)

20 mm

0.79 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

* All brake rotors have a minimum thickness dimension cast into them. Replace any rotor that is worn or machined below this specification.