FHX ✓ Factory-verified

GMC · Regular Production Option

Fuel, diesel B20 capable

Years 2014–20, 2022–27 Models 4 Factory citations 19

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Also described as Vehicle fuel, diesel B20Fuel, diesel, B20 capable

Also documented for CadillacChevrolet

Documented applications

Savana — GMT610 (2003–2027) →

• 2014–2018, 2022 ✓ Factory-verified
  ⛭ GM factory document — 2014 chevrolet gh van elec bbm si brief, p.6.

  ⛭ GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.15.

  ⛭ GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.13.

Sierra — T1XX (2019–2026) →

• 2019–2020, 2022–2025 ✓ Factory-verified
  ⛭ GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.11.

  ⛭ GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.11.

  ⛭ GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.11.

  ⛭ GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.11.

  ⛭ GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.13.

  ⛭ GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.11.

Yukon — T1XX (2021–2027) →

• 2022–2023, 2025–2027 ✓ Factory-verified internal

  2027: O on all trims

  ⛭ GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.10.

  ⛭ GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.10.

  ⛭ GM factory document — 2025 gmc new yukon denali fleet order guide, p.73.

  ⛭ GM factory document — 2026 gmc yukon denali fleet order guide, p.79.

  ⛭ GM factory document — 2027 gmc yukon fleet order guide, p.68.

Yukon XL — T1XX (2021–2027) →

• 2022–2023, 2025–2027 ✓ Factory-verified internal

  2027: O on all trims

  ⛭ GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.10.

  ⛭ GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.10.

  ⛭ GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.79.

  ⛭ GM factory document — 2026 gmc yukon xl denali fleet order guide, p.80.

  ⛭ GM factory document — 2027 gmc yukon xl fleet order guide, p.70.

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