Engine, 3.8L V6, turbocharged, sequential fuel injection

Years 1984–85 Models 1

Also documented for Chevrolet

Documented applications

Regal — G-body (1983–1987)

1984–1985 Confirmed

T-Type and Grand National; gnttype.org's 1984 and 1985 VIN tables (engine VIN code 9); its 1983 table also prints LM9, as a carbureted turbo, but its own 1983 example gives the 4-barrel turbo engine as VIN code 3 with no RPO code, so 1983 is not claimed

This page aggregates every documented appearance of LM9 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.