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.
    YP6 Single-source

    Cadillac · Regular Production Option

    Seville Touring Sedan, Limited Edition

    Years 1989 Models 1
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    Documented applications

    Seville — K-body (1986–1991)
    • 1989 Single-source

      Wikipedia says the first production STSs for 1989 were sold as a Limited Edition with option code YP6; no other source read prints the code

    This page aggregates every documented appearance of YP6 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.