FHS Factory-verified

GMC · Regular Production Option

E85 FlexFuel capable

Years 2014–20, 2022–26 Models 7 Factory citations 22

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Also described as Vehicle fuel, gasoline E85Fuel capability, E85 FlexFuel, 2.4L DOHC 4-cylinder engine

Also documented for Buick Chevrolet

Documented applications

Savana — GMT610 (2003–2027)

2014–2018, 2023 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 — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.14.

Sierra HD — T1XX (2020–2027)

2025–2026 Factory-verified

only in: 2500 HD and 3500 HD pickup; Pro: O; SLE, SLT, AT4, AT4X, Denali, Denali Ultimate: not offered

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.44.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.42.

Sierra — K2XX (2014–2019)

2016–2018 Factory-verified

GM factory document — 2016 gmc sierra 1500 fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.18.
GM factory document — 2018 gmc sierra 1500 order guide copy gm authority, p.88.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 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.
GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Terrain — First generation (2010–2017)

2016–2017 Factory-verified

only in: FWD (TLF26, TLH26, TLJ26) with FE9 Federal emissions; SLE-1, SLE-2, SLT, Denali: O; included on fleet and government orders

GM factory document — 2016 gmc terrain fleet order guide wayback, p.4.
GM factory document — 2017 gmc terrain fleet order guide wayback, p.4.

Yukon — K2XX (2015–2020)

2015 Factory-verified

2015: SLE, SLT: A, fleet or government orders only, new; the 2016 guide does not print it

GM factory document — 2015 gmc yukon denali fleet order guide wayback, p.4.

Yukon XL — K2XX (2015–2020)

2015 Factory-verified

SLE, SLT: A, fleet and government orders only; Denali: not available; not in the 2016 guide

GM factory document — 2015 gmc yukon xl denali fleet order guide wayback, p.4.

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