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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    U-21 Factory-verified

    Oldsmobile · Regular Production Option

    Rally Pack gauges

    Years 1967–70 Models 2 Factory citations 1

    Also described as Rally PackRocket Rally Pack

    Documented applications

    Cutlass / 4-4-2
    • 1967 Confirmed

      —

    • 1968–69 Factory-verified

      Std equipment on W-30; 1969 factory service list: "Rally Pack"

      GM Heritage factory kit — 1969 Oldsmobile 442 Info Kit, p.247.

    Related codes · mentioned in these notes

    W-30

    This page aggregates every documented appearance of U-21 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.