305ci 180hp engine (California only)

Years 1979–82 Models 3 Factory citations 5

Also described as 305ci 155 hp 4-bbl V8305ci 4-bbl V8

Documented applications

Camaro

1980–1981 Factory-verified

GM Heritage factory kit — 1980 Chevrolet Camaro, p.5.
GM Heritage factory kit — 1981 Chevrolet Camaro, p.11.

Corvette (C3)

1980 Factory-verified

$50.00 credit (CAC shows -$50; CorvSport shows $50; CorvetteStory n/a); 3,221 built — mandatory on all California cars, matching YF5 count; auto trans only; factory kit confirms RPO LG4 (p.6/p.59/p.62) at 3,221 built with a $50 credit

GM Heritage factory kit — 1980 Chevrolet Corvette, p.6.

Monte Carlo

1979–1982 Factory-verified

160 hp 4-bbl option

GM Heritage factory kit — 1979 Chevrolet Monte Carlo, p.36.
GM Heritage factory kit — 1982 Chevrolet Monte Carlo, p.24.

This page aggregates every documented appearance of LG4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.