Engine, 3.0L (181 cu in) V6, multiport fuel injection (VIN L)

Years 1985–88 Models 3

Also described as 3.0 L (181 cu in) V6, multiport fuel injection (VIN L)Engine, 3.0L V6, 181 cu in, multiport fuel injection (VIN L)

Also documented for Oldsmobile Pontiac

Documented applications

LeSabre — H-body (1986–1991)

1986 Single-source

125 hp; the standard engine for 1986 (Wikipedia's LeSabre article), which also dates it with the Buick V6 engine article's LeSabre list (1986 only); gnttype.org's tables print LN7 only for the Somerset, not the LeSabre, so no second source

Skylark — N-body (1986–1991)

1986–1988 Single-source

Wikipedia's Skylark article gives it to the Skylark for 1986–1988 and says it was replaced by the 3.3 L V6 (1989); it was the engine of the T-Type, new for 1987; gnttype.org's 1986 and 1987 tables print LN7 only on the Somerset rows, never the Skylark's, so the nameplate's own sources print the code only in Wikipedia; Wikipedia's Buick V6 article lists the Skylark 1986–1988 (not an independent source); the VIN letter is from the 1986 NICB engine table (3.0 L V6 MFI)

Somerset — N-body (1985–1987)

1985–1987 Confirmed

the Buick V6 introduced for the Somerset, 125 hp, with the three speed automatic only (Wikipedia's Skylark article); Wikipedia's Buick V6 engine article prints LN7 and VIN code L and lists the Somerset for 1985–1987; gnttype.org's 1986 and 1987 Buick VIN tables print it for the Somerset Custom and Limited, a second source (owner ruling, 2026-11-05: a T3 page that names the code for the nameplate, with Wikipedia dating every year); its 1985 table repeats the 1986 table, so 1985 rests on Wikipedia; the NICB manuals print VIN L for the 3.0L V6 MFI but no RPO codes

This page aggregates every documented appearance of LN7 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.