Crankshaft Bearing Selection Specifications

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
1	Bearing Grade Specification

Cylinder Block Seat Diameter	Bearing	Crankshaft Main Journal Diameter
		D	C	B	A
		Use This Bearing Color
A 64. 993 - 65. 000	Upper Bearing	Blue	Blue	Red	Red
A 64. 993 - 65. 000	Lower Bearing	Yellow	Blue	Blue	Red
B 64. 987 - 64. 993	Upper Bearing	Yellow	Blue	Blue	Red
B 64. 987 - 64. 993	Lower Bearing	Yellow	Yellow	Blue	Blue
C 64. 981 - 64. 987	Upper Bearing	Yellow	Yellow	Blue	Blue
C 64. 981 - 64. 987	Lower Bearing	Green	Yellow	Yellow	Blue
D 64. 974 - 64. 981	Upper Bearing	Green	Yellow	Yellow	Blue
D 64. 974 - 64. 981	Lower Bearing	Green	Green	Yellow	Yellow