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 stamping in the engine block indicate the engine unit number/build code date.
The primary location for the engine ID is on front of the rocker cover (1).
The primary (2) and secondary (3) hand stamp locations for the Vehicle Identification Number (VIN).
The engine identification (ID) number is located on the left side rear of the engine block (1).
Digits 1 thru 5 identify the engine type.
Digits 6 thru 12 identify the engine serial number.