GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Caliper Bore Diameter - Front

57.0 mm

2.24 in

Caliper Bore Diameter - Rear

35.0 mm

1.38 in

Front Brakes

  • Rotor Discard Thickness*

22.8 mm

0.87 in

  • Rotor Maximum Allowable Lateral Runout

0.030 mm

0.001 in

  • Rotor Maximum Allowable Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.008 mm

0.0003 in

  • Rotor Minimum Allowable Thickness After Refinish

23.1 mm

0.90 in

  • Rotor Thickness - NEW

25.0 mm

0.98 in

Rear Brakes

  • Rotor Discard Thickness*

8.0 mm

0.31 in

  • Rotor Maximum Allowable Lateral Runout

0.030 mm

0.001 in

  • Rotor Maximum Scoring

1.50 mm

0.059 in

  • Rotor Maximum Allowable Thickness Variation

0.01 mm

0.0004 in

  • Rotor Minimum Allowable Thickness After Refinish

9.0 mm

0.35 in

  • Rotor Thickness - NEW

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 specification.