GM Service Manual Online
For 1990-2009 cars only

Object Number: 1619794  Size: MF
(1)Engine ID Location
(2)Engine ID Location
(3)The first digit identifies the engine build location - All first digits will be a T, this engine is only being built at Tonawanda
(4)The second and third digits identifies the build year
(5)The fourth, fifth and sixth digits identify the build month - Julian Date
(6)The seventh through tenth digits identify the engine build sequence