GM Service Manual Online
For 1990-2009 cars only

Engine VIN Derivative and Identification Locations


Object Number: 785716  Size: SH

The 2.6L (LY9) primary location (1) is on the cam drive cover on the front of the engine.

The 2.6L (LY9) VIN Derivatives location (1) and 3.2L (LA3) engine secondary location (2) are stamped on a metal plate located on the left side of the engine.

A six digit stamping with emission and compression coding (3).

Six Digit Engine Stamp


Object Number: 349154  Size: SH
(1)Engine Type
(2)Mixture System
(3)Compression Ratio
(4)Engine Displacement
(5)Engine Emission Data