Engine, 5.0L V8, 4 barrel, California

Years 1984–86 Models 2 Factory citations 5

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Also documented for Cadillac Chevrolet

Documented applications

Sierra — Square body (1983–1991)

1984–1986 Factory-verified

shared platform code; cited from the square-body C/K pickup kits; the 1984 option page offers it on 2WD 10 series only with YF5 California emissions and the MX0 automatic

GM Heritage factory kit — 1984 Chevrolet Truck, p.37.
GM Heritage factory kit — 1985 Chevrolet Truck, p.92.
GM Heritage factory kit — 1986 Chevrolet Truck, p.64.

Vandura and Rally — Second generation G-series (1983–1996)

1984, 1986 Factory-verified

305 cu in; G10 and G20 only, with MX0 automatic and YF5 California emissions; 1984 from the February 1984 data book pages in the mislabelled G-Van kit file; shared G-van platform code; cited from the Chevrolet G-Van kit

GM Heritage factory kit — 1985 Chevrolet G Van, p.14.
GM Heritage factory kit — 1986 Chevrolet G Van, p.59.

This page aggregates every documented appearance of LF3 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.