GM Service Manual Online
For 1990-2009 cars only

Brake Drum Dimensions

Specification

Metric

English

Brake Drum Discard Diameter

226.57 mm

8.920 in

Brake Drum Inside Diameter (new)

225.12 mm

8.863 in

Brake Drum Maximum Diameter After Refinish

226.30 mm

8.909 in

Brake Drum Maximum Allowable Radial Runout

0.15 mm

0.006 in

Brake Drum Maximum Allowable Scoring

1.5 mm

0.06 in

Wheel Cylinder Bore Diameter

22.20 mm

0.874 in