Engine, 4.3 L V6, CPI

Years 1970–82, 1996–00 Models 5 Factory citations 12

Also described as Engine - V8, 400 Cu. In., 2-bbl carburetor400 CID V8 225hp400ci (small-block) 2-bbl V8400ci small-block 2-bbl V8

Also documented for GMC

Documented applications

Chevelle / El Camino

1970 Confirmed

Impala / Full-Size

1970- Factory-verified

2 barrel

GM Heritage factory kit — 1970 Chevrolet, p.4.
1970–1972 Factory-verified

GM Heritage factory kit — 1970 Chevrolet, p.4.
GM Heritage factory kit — 1972 Chevrolet, p.10.

Monte Carlo

1970 Factory-verified

dropped after 1970 on MC

GM Heritage factory kit — 1970 Chevrolet Monte Carlo, p.6.

Blazer — S-10 second generation (1995–2005)

1998–2000 Factory-verified

2000 list adds gas, 6 cylinder and 90 degree; the 1998–1999 wording matches L35

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet blazer 4wd rpo code list, p.1.

S-10 pickup — Second generation (1994–2004)

1996–2000 Factory-verified

2000 list adds gas, 6 cylinder and 90 degree; the 1998–1999 wording matches L35 (1998–1999 lists)

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet s10 pickup 4wd rpo code list, p.1.
GM Heritage factory kit — 1996 Chevrolet S 10, p.7.
GM Heritage factory kit — 1997 Chevrolet S 10, p.12.

This page aggregates every documented appearance of LF6 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.