GM Service Manual Online
For 1990-2009 cars only

Original Drum Diameter

Maximum After Refinish

Replacement (Discard)

Maximum Out-of-Round or Taper

241.3 mm

(9.5 in)

242.82 mm

(9.56 in)

243.59 mm

(9.59 in)

0.015 mm

(0.006 in)