GM Service Manual Online
For 1990-2009 cars only

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.