GM Service Manual Online
For 1990-2009 cars only

Disc Brake Component Specifications LWB SWB

Application

Specification

Metric

English

Front Brake Rotors

  • Rotor Diameter

298 mm/321 mm

11.7 in/12.6 in

  • Rotor Discard Thickness

28 mm

1.1 in

  • Rotor Maximum Allowable Assembled Lateral Runout

0.050 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.5 mm

0.060 in

  • Rotor Maximum Allowable Thickness Variation

0.02 mm

0.001 in

  • Rotor Minimum Thickness after Refinishing

28.75 mm

1.13 in

  • Rotor Thickness New

30 mm

1.18 in

Rear Brake Rotors

  • Rotor Diameter

302 mm/324 mm

11.90 in/12.75 in

  • Rotor Discard Thickness

20 mm

0.80 in

  • Rotor Maximum Allowable Assembled Lateral Runout

0.05 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.5 mm

0.060 in

  • Rotor Maximum Allowable Thickness Variation

0.02 mm

0.001 in

  • Rotor Minimum Thickness after Refinishing

20.75 mm

0.82 in

  • Rotor Thickness New

22 mm

0.87 in