Engine, 2.5L L4, electronic fuel injection

Years 1982–85 Models 1 Factory citations 4

Also documented for Cadillac Chevrolet GMC

Documented applications

Firebird — Third generation (1982–1992)

1982–1985 Factory-verified

Wikipedia calls it the Pontiac 2.5L throttle-body four and drops it for 1986; Firebird years: Wikipedia 1982–1985; thirdgen.org powertrain tables 1982, 1984; shared F-body code; cited from the Camaro kits

GM Heritage factory kit — 1982 Chevrolet Camaro, p.35.
GM Heritage factory kit — 1983 Chevrolet Camaro, p.35.
GM Heritage factory kit — 1984 Chevrolet Camaro, p.3.
GM Heritage factory kit — 1985 Chevrolet Camaro, p.33.

This page aggregates every documented appearance of LQ9 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.