FHX Factory-verified

Chevrolet · Regular Production Option

Fuel, diesel B20 capable

Years 2014–19, 2022–23, 2025–27 Models 6 Factory citations 22

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Also described as Fuel, diesel B20Vehicle fuel, diesel B20Fuel, diesel, B20

Also documented for Cadillac GMC

Documented applications

Equinox — Third generation (D2XX) (2018–2024)

2019 Factory-verified internal

; only with the LH7 diesel

GM factory document — 2019 chevrolet equinox order guide april 6 2018 copy gm authority, p.117.

Express — GMT610 (2003–2027)

2014–2018, 2022 Factory-verified

GM factory document — 2014 chevrolet gh van elec bbm si brief, p.6.
GM factory document — 2015 chevrolet express savana electrical body builders manual service manual 2015 en us, p.12.
GM factory document — 2016 chevrolet express savana electrical body builders manual service manual 2016 en us, p.7.
GM factory document — 2017 chevrolet express savana electrical body builders manual service manual 2017 en us, p.7.
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.

Silverado HD (T1XX, 2020–2027)

2023 Factory-verified

only in: 2500 HD and 3500 HD for 2023 (the Upfitter list)

GM factory document — 2023 chevrolet 23silverado 2500 3500hd electrical body builder sm en us 2022oct12, p.11.

Silverado Medium Duty (GM515, 2019–2026)

2025–2026 Factory-verified

GM factory document — 2025 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

Suburban — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified internal

2027: LT, RST, Z71, Premier, High Country: O

GM factory document — 2025 chevrolet new suburban fleet order guide, p.58.
GM factory document — 2026 chevrolet suburban fleet order guide, p.62.
GM factory document — 2027 chevrolet suburban fleet order guide, p.58.
GM factory document — 2022 chevrolet 22 suburban tahoe electrical body builder sm u 2021oct08, p.10.
GM factory document — 2023 chevrolet 23 suburban tahoe electrical body builder sm en us 2022sep13, p.10.
GM factory document — 2026 chevrolet suburban tahoe electrical body builder manual service manual 2026 en us, p.6.

Tahoe — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified internal

2027: LT, RST, Z71, Premier, High Country: O

GM factory document — 2025 chevrolet new tahoe retail and fleet fleet order guide, p.76.
GM factory document — 2026 chevrolet tahoe retail and fleet fleet order guide, p.82.
GM factory document — 2027 chevrolet tahoe retail and fleet fleet order guide, p.75.
GM factory document — 2022 chevrolet 22 suburban tahoe electrical body builder sm u 2021oct08, p.10.
GM factory document — 2023 chevrolet 23 suburban tahoe electrical body builder sm en us 2022sep13, p.10.
GM factory document — 2026 chevrolet suburban tahoe electrical body builder manual service manual 2026 en us, p.6.

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