GM Service Manual Online
For 1990-2009 cars only

Application

Specification

Metric

English

Brake Pedal Travel

Brake pedal travel maximum with 445 N (100 lb) force applied to the pedal with ignition OFF and vacuum or hydraulic assist depleded.

57.00 mm

2.25 in

Brake Drums

  • Discard Diameter
  • See Important at the bottom

226.30 mm

8.909 in

  • Inside Diameter

225.12 mm

8.863 in

  • Maximum Refinish Diameter

226.57 mm

8.920 in

  • Runout

0.15 mm

0.006 in

Brake Rotors

  • Discard Thickness
  • See Important at the bottom

30.70 mm

1.209 in

  • Lateral Runout

0.060 mm

0.002 in

  • Minimum Thickness After Refinish

31.08 mm

1.224 in

  • Rotor Thickness (Maximum)

32.00 mm

1.260 in

  • Thickness Variation

0.013 mm

0.0005 in

  • Front Caliper Bore Diameter

63.50 mm

2.50 in

  • Master Cylinder Bore Diameter

25.40 mm

1.000 in

  • Minimum Vacuum at Power Booster

--

14 in Hg

  • Wheel Cylinder Bore Diameter

23.80 mm

0.937 in

Important:: All brake drums and rotors have a discard dimension cast into them. This is a wear dimension and not a refinish dimension. any drum or rotor which does not meet the specification should be replaced.