Engine, 5.0L V8, fuel injection, 305 cu in

Years 1991–92 Models 1 Factory citations 1

Also documented for Buick Chevrolet GMC Pontiac

Documented applications

Fleetwood Brougham / Brougham — D-body (1983–1992)

1991–1992 Single-source

Chevrolet 305 V8 that replaced the LV2; matched to the Brougham by meaning only: Wikipedia's Brougham article names the Chevrolet 305 fuel injected V8 for these years and the Chevrolet small-block engine article lists the Brougham among 305 vehicles for 1991 and 1992, but neither prints the code (one source); the code is the Chevrolet Caprice's 5.0 liter V8 with electronic fuel injection, printed (as LO3) in the Caprice kit's wagon specification page (no printed model year; the years come from Wikipedia only), which is sibling corroboration only

GM Heritage factory kit — 1991 Chevrolet Caprice, p.6.

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