GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Caliper Bore Diameter - Front 16 Inch and 17 Inch

60.0 mm

2.36 in

Caliper Bore Diameter - Front 17 Inch Plus

2x42.0 mm

2x1.65 in

Caliper Bore Diameter - Rear

40.0 mm

1.57 in

Front Brakes

  • Rotor Diameter - 16 Inch

296.0 mm

11.653 in

  • Rotor Diameter - 17 Inch

321.0 mm

12.637 in

  • Rotor Diameter - 17 Inch Plus

337.0 mm

13.267 in

  • Rotor Discard Thickness*

27.0 mm

1.07 in

  • Rotor Maximum Allowable Assembled Lateral Runout - with Wheel Attached

0.05 mm

0.002 in

  • Rotor Maximum Allowable Thickness Variation

0.006 mm

0.00024 in

  • Rotor Thickness New

30.0 mm

1.18 in

Rear Brakes

  • Rotor Diameter - 16 Inch

292 mm

11.5 in

  • Rotor Diameter - 17 Inch

315 mm

12.40 in

  • Rotor Discard Thickness* - 16 Inch

10.0 mm

0.395 in

  • Rotor Discard Thickness* - 17 Inch

21.0 mm

0.827 in

  • Rotor Maximum Allowable Assembled Lateral Runout - with Wheel Attached

0.05 mm

0.002 in

  • Rotor Maximum Allowable Thickness Variation

0.006 mm

0.0003 in

  • Rotor Thickness New - 16 Inch

12.0 mm

0.472 in

  • Rotor Thickness New - 17 Inch

23.0 mm

0.905 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.