Engine ID and VIN Derivative Location

The engine code letter is the eight digit of the VIN, which identifies the engine.

Stick-on labels attached to the engine, laser etching, or stampings in the engine block indicate the engine unit number/build code date.

The primary location (1) of the VIN derivative and the secondary location (2) of the VIN derivative for the 3400 (LA1) engine is above the starter motor on the engine block.