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

    Archive / Chevrolet / Code
    4JS ✓ Factory-verified

    Chevrolet · Regular Production Option

    Interior trim, Jet Black/Umber

    Years 2022–26 Models 2 Factory citations 7
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    Documented applications

    Silverado HD (T1XX, 2020–2027) →
    • 2023 ✓ Factory-verified
      ⛭ GM factory document — 2023 chevrolet 23silverado 2500 3500hd electrical body builder sm en us 2022oct12, p.9.
    Silverado — T1XX (2019–2026) →
    • 2022–2026 ✓ Factory-verified

      in the 2022 new-model and LTD, 2023, 2024, 2025 and 2026 Upfitter RPO lists;

      ⛭ GM factory document — 2022 chevrolet 22 silverado 1500 new electrical body builder 042822, p.9.
      ⛭ GM factory document — 2022 chevrolet 22 silverado 1500 ltd electrical body suilder sm en us u 2021oct08, p.9.
      ⛭ GM factory document — 2023 chevrolet 23 silverado 1500 electrical body builder sm en us 2022oct24, p.9.
      ⛭ GM factory document — 2024 chevrolet 24 silverado1500 electrical body builder 2023nov29, p.10.
      ⛭ GM factory document — 2025 chevrolet my25 silverado 1500 electrical bbm, p.8.
      ⛭ GM factory document — 2026 chevrolet silverado 1500 electrical body builder manual service manual 2026 en us, p.4.

    This page aggregates every documented appearance of 4JS in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.

    RPOARCHIVE

    A factory-sourced reference to GM Regular Production Option codes, 1960–2027. Every code carries a confidence grade and, where the factory documents it, a citation to the exact GM factory document and page.

    Reference

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    Provenance

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    • About this project

    Independent reference work — not affiliated with or endorsed by General Motors. “GM,” “Chevrolet,” “Pontiac,” “Oldsmobile,” “Buick,” “Cadillac,” “GMC,” “Saturn,” and “Hummer” are trademarks of their respective owners, used nominatively to identify the vehicles this data describes. No GM logos or emblems are reproduced.

    Data compiled from GM Heritage factory documentation and cross-referenced public sources. Generated from a curated, versioned dataset.