GM Service Manual Online
For 1990-2009 cars only

Engine Identification L98, LS2


Object Number: 1995919  Size: SH

The Engine Serial Number is located on the right-hand side at the front of the engine cylinder block (1) and is stamped or laser etched onto the block at the assembly plant. The number is prefixed by the engine model number. As an example 7NC is used. When reading the Engine Serial Number the following information can be obtained:

Engine Serial Number 7NC071904500 is used as an example:

    • The first three digits, 7NC, identify the engine model.
    • The next two digits, 07, identify the engine model year as 2007.
    • The next three digits, 190, identify the Julian date the engine was manufactured as day 190.
    • The next four digits, 4500, identify the assembly plant sequence number as 4500.

Engine Identification LS3


Object Number: 1559818  Size: SH

The vehicle identification number (VIN) is located on the left side rear of the engine block (1) and is typically a 9 digit number stamped or laser-etched onto the engine at the vehicle assembly plant.

    • The first digit identifies the division.
    • The second digit identifies the model year.
    • The third digit identifies the assembly plant.
    • The fourth through ninth digits are the last 6 digits of the VIN.