GM Service Manual Online
For 1990-2009 cars only

Cylinder Block Grade

Crankshaft Journal Grade

Identification Bearing Color

Oil Clearance

Metric (mm)

English (in)

1

1

Black

0.041-0.068

0.0016-0.0027

1

2

Brown

0.039-0.065

0.0015-0.0026

2

1

Blue

0.043-0.070

0.0017-0.0028

2

2

Black

0.041-0.067

0.0016-0.0027