The eighth character in the Vehicle Identification Number (VIN) identifies the engine. Adhesive-backed labels attached to the engine, laser etching or stampings on the engine block indicate the engine unit number/date code. All engines are stamped with a VIN derivative. For added information on VIN derivative, refer to VIN Derivative .
3.1L VIN Engine Location, LG8
The primary location (1) of the VIN derivative for the 3100 LG8 engine is above the starter motor on the engine block.
The primary location (1) and the secondary location (2) for the Engine ID for the 3100 LG8 engine is on top of the RH rocker arm cover or front of RH oil pan rail.
3.8L VIN Engine Location, L36/L67
The primary location of the VIN derivative for the 3800 L36 and L67 engine is above the starter motor on the engine block (1).
The secondary location of the VIN derivative for the 3800 L36 and L67 engine is below the water pump on the engine block (1).
The primary location (1) of the Engine ID for the 3800 L36 and L67 engine is on the center of the LH rocker arm or LH side of the engine in the oil pan rail area of the engine.
