Engine, gas, 4 cylinder, 1.9L, SOHC

Years 1991–93 Models 2

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Also documented for Buick Chevrolet GMC

Documented applications

Saturn SC — first generation (1991–1996)

1993 Single-source

Wikipedia ties it to the SC1, which it says was added for 1993; the article dates no other year for the SC1's LK0 (it says only that the SC1 engine was upgraded for 1995), so 1994 is not claimed. Wikipedia (T4).

SL — first generation (1991–1995)

1991–1992 Single-source

only in: SL, SL1. The article gives the SL and SL1 only this engine for 1991 to 1992; it dates LK0 for no other year. [Wikipedia Saturn S-Series, first generation SL section]

This page aggregates every documented appearance of LK0 in the Saturn reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.