Engine, 5.0L V8, electronic fuel injection

Years 1987–95 Models 3 Factory citations 11

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Also documented for Buick Cadillac Chevrolet Pontiac

Documented applications

Sierra — Square body (1983–1991)

1987 Factory-verified

shared platform code; cited from the square-body C/K pickup kits; the 1987 power team pages list the 5.0 liter (305 cu in) V8 with electronic fuel injection; the kit pages also print LO3

GM Heritage factory kit — 1987 Chevrolet Truck, p.37.

Suburban — Square body (1983–1991)

1987 Factory-verified

only in: R10/1500; the 1987 power team chart heads its R10906 teams with L03; the 1987 standard equipment page also prints LO3; shared square-body platform code; cited from the Chevrolet Suburban kit

GM Heritage factory kit — 1987 Chevrolet Suburban, p.15.

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

1987–1995 Single-source

305 cu in; the 1989 page prints LO3; shared G-van platform code; cited from the Chevrolet G-Van kit; 1991–1995 rests on the Chevrolet-only G-Van books, so the row is single-source

GM Heritage factory kit — 1987 Chevrolet G Van, p.14.
GM Heritage factory kit — 1988 Chevrolet Vandura, p.10.
GM Heritage factory kit — 1989 Chevrolet G Van, p.17.
GM Heritage factory kit — 1990 Chevrolet G Van, p.6.
GM Heritage factory kit — 1991 Chevrolet G Van, p.28.
GM Heritage factory kit — 1992 Chevrolet G Van, p.20.
GM Heritage factory kit — 1993 Chevrolet G Van, p.15.
GM Heritage factory kit — 1994 Chevrolet G Van, p.28.
GM Heritage factory kit — 1995 Chevrolet G Van, p.5.

This page aggregates every documented appearance of L03 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.