3.8 L (231 cu in) Buick V6, fuel injected (VIN 3): multi-port 1984–1985, sequential 1986–1988

Standard on the T-Type 1985–1986; for 1984–1985 the parts catalog labels this engine LN3, while Wikipedia and a GM-wide code list give LG3; from 1986 the catalog also reads LG3

VIN code 3; multiport injection, 125 hp in 1985 (the Electra 380), sequential from 1986, 150 hp (Wikipedia); Wikipedia's Buick V6 article lists the 1985–1987 Electra for the 3.8 FWD engine and gives VIN code 3 as the LG3; gnttype.org's 1986 and 1987 VIN tables print it as the Electra's engine, but its 1985 Electra block is word for word its 1986 block (sequential injection, coupe body 37 where the 1985 NICB manual prints 11, no 3.0L or diesel), a copy and not a second source; no sibling-platform source dates the code for 1985 (Wikipedia's Oldsmobile 98 article names the 1985 Buick 3.8 without a code), so 1985 rests on Wikipedia alone and the row is single-source; 1988 is left out: Wikipedia's Electra article says the older VIN 3 engine was still in some 1988 Electras, but its Buick V6 article ends the Electra at 1987

150 hp; Wikipedia's LeSabre infobox gives the slash form "LG2/LG3" and its Buick V6 engine article lists the LeSabre for 1986–1987 under a combined "LG2/LG3" heading, so neither names LG3 for this car (a slash form names neither code); gnttype.org's 1986 and 1987 Buick VIN tables each print the 3.8L V6 SFI, engine option code LG3, for the LeSabre Custom and Limited, but the two LeSabre blocks print the same engine cell and differ only in body type and a restraint field, so they are one source; the 1986 NICB manual prints a 3.8L V6 fuel-injected engine with VIN 3 but no RPO codes

Riviera Luxury; the Wikipedia Riviera article names LG3 (roller lifters) as the 1987 engine, and gnttype.org's 1987 Buick VIN table prints LG3 (VIN code 3) for the Riviera Luxury, built at Hamtramck; 1986 is left out because gnttype.org's 1986 table also prints LG3 for the Riviera while Wikipedia gives LG2 for that year; decoderpo.com's dictionary prints LG3 only as an unrelated 4.3L (262 cu in) V6 engine for direct sales, so it is no check on this meaning