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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    K03 Factory-verified

    Cadillac · Regular Production Option

    Engine block heater, 110V

    Years 2025 Models 1 Factory citations 2
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    Also documented for Chevrolet

    Documented applications

    Related codes · mentioned in these notes

    O

    This page aggregates every documented appearance of K03 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.