GM Service Manual Online
For 1990-2009 cars only

Mark

Thickness (mm)

Thickness (in)

A

2.30-2.35

0.0906-0.0925

B

2.35-2.40

0.0925-0.0945

C

2.40-2.45

0.0945-0.0965

D

2.45-2.50

0.0965-0.0984

E

2.50-2.55

0.0984-0.1004

F

2.55-2.60

0.1004-0.1024

G

2.60-2.65

0.1024-0.1043