GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Front Brake Rotors (Base)

  • Rotor Diameter

298 mm

11.732 in

  • Rotor Discard Thickness

28 mm

1.102 in

  • Rotor Maximum Allowable Assembled Lateral Runout

0.05 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.5 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.02 mm

0.001 in

  • Rotor Minimum Thickness after Refinishing

28.75 mm

1.132 in

  • Rotor Thickness New

30 mm

1.181 in

Front Brake Rotors (GT)

  • Rotor Diameter

321 mm

12.638 in

  • Rotor Discard Thickness

28 mm

1.102 in

  • Rotor Maximum Allowable Assembled Lateral Runout

0.05 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.5 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.02 mm

0.001 in

  • Rotor Minimum Thickness after Refinishing

28.75 mm

1.131 in

  • Rotor Thickness New

30 mm

1.181 in

Front Brake Rotors (GXP)

  • Rotor Diameter

355 mm

13.976 in

  • Rotor Discard Thickness

30 mm

1.181 in

  • Rotor Maximum Allowable Assembled Lateral Runout

0.06 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.5 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.025 mm

0.001 in

  • Rotor Minimum Thickness after Refinishing

30.75 mm

1.211 in

  • Rotor Thickness New

32 mm

1.26 in

Rear Brake Rotors (Base)

  • Rotor Diameter

302 mm

11.890 in

  • Rotor Discard Thickness

20 mm

0.787 in

  • Rotor Maximum Allowable Assembled Lateral Runout

0.05 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.5 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.02 mm

0.001 in

  • Rotor Minimum Thickness after Refinishing

20.75 mm

0.817 in

  • Rotor Thickness New

22 mm

0.866 in

Rear Brake Rotors (GT and GXP)

  • Rotor Diameter

324 mm

12.751 in

  • Rotor Discard Thickness

20 mm

0.787 in

  • Rotor Maximum Allowable Assembled Lateral Runout

0.05 mm

0.002 in

  • Rotor Maximum Allowable Scoring

1.5 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.02 mm

0.001 in

  • Rotor Minimum Thickness after Refinishing

20.75 mm

0.817 in

  • Rotor Thickness New

22 mm

0.866 in