GM Service Manual Online
For 1990-2009 cars only

The L81 3.0 engine VIN Derivative location is stamped on a metal plate located on the drivers side (left) of the engine.

The Engine ID location is on the cam drive cover on the front of the engine (1).


Object Number: 212211  Size: SH

A six digit stamping with emission and compression coding.

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