RPOARCHIVE
Loading index…

    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    K4 Confirmed

    Buick · Regular Production Option

    Depressed-park wipers

    Years 1970 Models 1

    Documented applications

    This page aggregates every documented appearance of K4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.