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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    LG5 Single-source

    Pontiac · Regular Production Option

    Engine, 3.1L V6, turbocharged, multiport fuel injection

    Years 1989–90 Models 1
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    Documented applications

    Grand Prix — W-body (1988–1996)
    • 1989–1990 Single-source

      the McLaren turbo engine, 205 hp, with the 4 speed automatic only (Wikipedia); Wikipedia's Grand Prix infobox prints LG5 and its 60° V6 article lists the Grand Prix Turbo under LG5 for 1989–1990 (and the Turbo STE for 1990); GM's lists read LG5 as a 7.2L diesel on other vehicles (a reused code); no kit prints it

    This page aggregates every documented appearance of LG5 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.