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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    LA5 Confirmed

    Buick · Regular Production Option

    1.8 L L4, SOHC, turbocharged, multi-port fuel injection (VIN J)

    Years 1984–86 Models 1
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    Also documented for Pontiac

    Documented applications

    Skyhawk — J-body (1982–1989)
    • 1984–1986 Confirmed

      150 hp; Wikipedia: optional on the T-Type, two-door bodies only, and not with the five-speed manual (1984); Wikipedia's Skyhawk and Family II engine articles give it to the Skyhawk 1984–1986; gnttype.org's 1984–1985 Buick VIN tables print it for the Skyhawk, a second source (owner ruling, 2026-11-05: a T3 page that names the code for the Skyhawk, with Wikipedia dating every year)

    This page aggregates every documented appearance of LA5 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.