GM Service Manual Online
For 1990-2009 cars only

*Crankshaft Connecting Rod Journal

**Connecting Rod Journal Bore

1 or I

2 or II

3 or III

4 or IIII

A or I

Pink

Pink/Yellow

Yellow

Yellow/Green

B or II

Pink/Yellow

Yellow

Yellow/Green

Green

C or III

Yellow

Yellow/Green

Green

Green/Brown

D or IIII

Yellow/Green

Green

Green/Brown

Brown

E or IIIII

Green

Green/Brown

Brown

Brown/Black

F or IIIIII

Green/Brown

Brown

Brown/Black

Black

Important: The color code is on the edge of the bearing. When using bearing halves of different colors, it does not matter which color is used in the top or bottom position.

*As the letters or numbers increase, the crankshaft journal diameter decreases and the bearing thickness increases.

**As the numbers increase, the connecting rod bore diameter increases and the bearing thickness increases.