Engine, 5.0L V8, electronic fuel injection

Years 1988–92 Models 1 Factory citations 5

Also documented for Buick Cadillac Chevrolet GMC

Documented applications

Firebird — Third generation (1982–1992)

1988–1992 Factory-verified

Wikipedia and 3rdgenformula call it throttle body injection; 3rdgenformula prints LO3 (letter O) for 1991, and the cited 1990–1992 Camaro pages (1990 p.43, 1991 p.31, 1992 p.89) print LO3 on the engine line; the zero form is the code; Firebird years: Wikipedia 1988–1992; 3rdgenformula option pages 1988–1992; shared F-body code; cited from the Camaro kits

GM Heritage factory kit — 1988 Chevrolet Camaro, p.33.
GM Heritage factory kit — 1989 Chevrolet Camaro, p.9.
GM Heritage factory kit — 1990 Chevrolet Camaro, p.43.
GM Heritage factory kit — 1991 Chevrolet Camaro, p.31.
GM Heritage factory kit — 1992 Chevrolet Camaro, p.89.

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