For 1990-2009 cars

(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