GM Service Manual Online
For 1990-2009 cars only

5.7L Engine Identification Numbers, LS1


Object Number: 63234  Size: SH
(1)Engine ID Number, Primary Location
(2)Engine ID Number, Secondary Location

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 stampings in the engine block indicate the engine unit number/build date code.

The engine ID number will be located in either the primary or the secondary location, as shown.

Engine VIN Derivative Locations


Object Number: 171897  Size: MF
(1)VIN Derivative, Primary Location
(2)VIN Derivative, Secondary Location

The engine is also stamped with a VIN derivative which will be located in either the primary or secondary location, as shown. For additional information, refer to VIN Derivative .