Bonneville — Eighth generation (1987–1991)

150 hp, the only engine at launch (VIN 3); Wikipedia's Bonneville infobox lists it for 1987–1988 and its Buick V6 engine article lists the Bonneville under LG3 for 1987 to early 1988 and says the LG3 was still available in some models after the LN3 arrived, while the Bonneville text says the LN3 replaced it for 1988, a mid-year changeover, so 1987–1988 is claimed and the two codes overlap in 1988; the Bonneville Club list prints the code and its meaning but no year; Wikipedia's infobox calls the fuel system SFI, the Bonneville Club list prints MFI

the revised 3.8 L, 165 hp, sold as the 3800 V6 (VIN C); Wikipedia's infobox gives multiport injection and its text says sequential-port, the Bonneville Club list prints MFI and "3800 I"; the Bonneville Club list prints the code but no year

matched to the unit by meaning: Wikipedia's infobox names the THM440T4 four-speed automatic for the whole generation (its text calls it the 4T60) but prints no code, and the Bonneville Club list, which has no year, prints ME9 with "THM440-T4"