RPOARCHIVE
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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    Y31–Y34, Y38–Y39 Single-source

    Cadillac · Regular Production Option

    Accessory group codes (Basic Groups 1–4, Equipment Groups 8–9)

    Years 1970 Models 1

    Documented applications

    This page aggregates every documented appearance of Y31–Y34, Y38–Y39 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.