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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    LF9 (AD) Confirmed

    Cadillac · Regular Production Option

    Diesel 5.7L V8

    Years 1979 Models 1

    Documented applications

    This page aggregates every documented appearance of LF9 (AD) in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.