Engine, 3.8L V6, 231 cu in, 2 barrel

the standard engine (Curbside Classic, 1984: 3.8L 2 barrel V6); Amsoil's 1983 and 1984 Bonneville lists give the 3.8L V6 (VIN engine code A) and Wikipedia gives the Buick 231 V6, but none prints the code, so it is matched by meaning; the Bonneville also had the 3.8L V6 in 1985 and 1986 (Amsoil), but the 1985 and 1986 Monte Carlo kits do not print LD5, so those years are not claimed; shared G-body code; cited from the Chevrolet Monte Carlo kit

the standard engine; Wikipedia's generation infobox gives LD5 for the Buick 231 V6, and its year sections name the 231 (3.8L) V6 in 1984 among the engines that continued from 1983, and as the standard engine for 1985–1987; Eighties Cars names LD5 as the 1987 standard engine; 1985–1986 rest on Wikipedia (the infobox code is undated; its 1985 and 1986 sections name the 3.8L V6 without a code), as the Monte Carlo kits print LD5 only to 1984; shared G-body code; cited from the Chevrolet Monte Carlo kit (1983–1984)

Wikipedia's Parisienne article lists the Buick 231 V6 among the generation's engines without a year and without the code, so the code is matched to the car by meaning and the years are the Caprice kits'; 1984 is left out because the 1984 kit's LD5 line (p.38) has no readable model year and its dated page (p.37) names LD5 only beside LC3; shared B-body code; cited from the Chevrolet Caprice kit