GM Service Manual Online
For 1990-2009 cars only

Drum Diameter

Original

Maximum Refinish

Replacement (Discard)

279.40 mm (11.0 in)

280.92 mm (11.06 in)

281.69 mm (11.09 in)

330.92 mm (13.0 in)

331.72 mm (13.06 in)

332.48 mm (13.09 in)