GM LT1 engine From Wikipedia the free encyclopedia General Motors has produced three different engines called LT1: 1970–1972 LT-1 – Chevrolet Generation I Small-Block 1992–1997 LT1 – GM Generation II Small-Block 2013–(current) LT1 - GM Generation V Small-Block. Index of articles associated with the same name This article includes a list of related items that share the same name (or similar names). If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.