2.0 L (121 cu in) L4, SOHC, turbocharged, multi-port fuel injection (VIN M)

Years 1987–90 Models 3

Also described as Engine, 2.0L L4, turbocharged, multiport fuel injection2.0 L L4, OHC, turbocharged, multi-port fuel injection

Also documented for Buick

Documented applications

Grand Am — N-body (1985–1991)

1987–1989 Single-source

165 hp, SE; Wikipedia's Grand Am article names LT3 in its infobox and says the turbo engine arrived in 1987 and gave way to LD2 as the SE's standard engine in 1989; its Family II engine article lists the Grand Am SE for 1987–1989 (not independent); cars with it carry a turbo boost gauge

J2000 / Sunbird — J-body (1982–1987)

1987 Single-source

165 hp, replacing the 1.8 L turbo (Wikipedia); Wikipedia's Sunbird Engines list and Family II article give it to the Sunbird from 1987 (the later years are the third generation's); the VIN letter is from the 1987 NICB Pontiac engine table

Sunbird — J-body (1988–1994)

1988–1990 Single-source

the GT's turbo engine, and in 1990 also the LE convertible's (Wikipedia); Wikipedia's Family II article lists the Sunbird among LT3's applications through 1990, and its Sunbird article says the turbo was dropped after 1990; no Cavalier kit page prints it

This page aggregates every documented appearance of LT3 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.