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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    UM5 Factory-verified

    Chevrolet · Regular Production Option

    AM-FM ETR stereo w/ 8-track & CB

    Years 1981 Models 1 Factory citations 1

    Documented applications

    Corvette (C3)
    • 1981 Factory-verified

      $712.00; 792 built

      GM Heritage factory kit — 1981 Chevrolet Corvette, p.5.

    This page aggregates every documented appearance of UM5 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.