Engine
The eighth digit of the vehicle identification number (VIN) is the engine code letter, which identifies the engine as a 3.8L V6 (VIN eighth digit: K) (RPO code L36).Adhesive backed labels attached to the engine, laser etching, or stamping in the engine block indicate the engine unit number/build date code. All engines are stamped with a VIN derivative. For more information on the VIN derivative, refer to VIN Derivative.
The primary location (1) of the VIN derivative for the 3800 engines is above the starter motor on the engine block.
The secondary location (1) of the VIN derivative for the 3800 engines is below the water pump on the engine block.
The primary location (1) of the Engine ID for the 3800 L36 and L67 engines is under the exhaust manifold close to where the bellhousing bolts to the block.
For a description of the RPO Code(s) shown in this article/images refer to the RPO Code List found at Vehicle/Application ID. RPO Codes