GM Service Manual Online
For 1990-2009 cars only

Brake Drum Dimensions

Specification

Metric

English

Brake Drum Discard Diameter

226.31 mm

8.909 in

Brake Drum Inside Diameter (new)

225.25 mm

8.868 in

Brake Drum Maximum Diameter After Refinish

225.78 mm

8.889 in

Brake Drum Maximum Allowable Radial Runout

0.104 mm

0.004 in

Brake Drum Maximum Allowable Scoring

1.50 mm

0.059 in

Wheel Cylinder Bore Diameter

22.20 mm

0.874 in