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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    LQ5 Confirmed

    Buick · Regular Production Option

    2.0 L (121 cu in) L4, OHV, throttle-body fuel injection (VIN P)

    Years 1983–86 Models 1
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    Also documented for CadillacChevroletOldsmobilePontiac

    Documented applications

    Skyhawk — J-body (1982–1989)
    • 1983–1986 Confirmed

      replaced the 1.8 L OHV engine for 1983, 86 hp (88 hp for 1986, Wikipedia); Wikipedia's Skyhawk and 122 engine articles give it to the Skyhawk 1983–1986; 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)

    Related codes · mentioned in these notes

    122

    This page aggregates every documented appearance of LQ5 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.