GM Service Manual Online
For 1990-2009 cars only

Vehicle Identification Number

The Vehicle Identification Number (VIN) Derivative is located in 2 places on the engine and is a nine digit number stamped or laser etched onto the block at the vehicle assembly plant. If reading the identification number the following information can be obtained:

    • The first digit identifies the vehicle division.
    • The second digit is the model year.
    • The third digit identifies the assembly plant.
    • The fourth through ninth digits are the last six digits of the Vehicle Identification Number (VIN).

Object Number: 1394245  Size: SH

The engine block is marked with the VIN on a pad area on the left rear side (1).


Object Number: 1394248  Size: SH

The engine block is marked with the VIN on a pad area on the center lower right side (1).

Engine Traceability Label

The engine traceability label is located in 2 places on the engine and consists of the broadcast code, bar code and sequence number.


Object Number: 945245  Size: SH

One engine traceability label (1) is located on the left rear side of the engine block.


Object Number: 945253  Size: SH

Another engine traceability label (1) is located on the rear of the left cylinder head.

Engine Verification Label

The engine verification label is located in 2 places on the engine and consists of the broadcast code and bar code.


Object Number: 945249  Size: SH

One engine verification label (1) is located on the left side of the engine front cover below the exhaust camshaft position sensor.


Object Number: 945252  Size: SH

Another engine verification label (1) is located on the rear of the right cylinder head.

Engine Identification Number

Note: When installing a part engine, the engine number must be stamped on the cylinder block before the engine is installed.


Object Number: 1394245  Size: SH

The engine code must be stamped into the flat area on the cylinder block on the transmission side (1), next to the starter.