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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    YA7 Confirmed

    Chevrolet · Regular Production Option

    California assembly-line emission test

    Years 1970–79 Models 2

    Also described as California assembly line emission test

    Documented applications

    This page aggregates every documented appearance of YA7 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.