The eighth digit of the vehicle identification number (VIN) is the engine code letter, which identifies the engine as a 5.7L V8 (VIN eighth digit: G) (RPO code LS1).
Stick-on labels attached to the engine, laser etching, or stamping in the engine block indicate the engine unit number/build date code.
The engine ID number will be located on the rear of LH cylinder head or the front part of the LH oil pan rail.
The engine is also stamped with a VIN derivative number which will be located in either the primary or secondary location, as shown. .
