- 2017–2019 Factory-verified
2019 guide: all trims: S
FHO Factory-verified
Also described as E10 fuel capableVehicle fuel, gasoline E10
Also documented for BuickChevrolet
Documented applications
- 2025–2027 Factory-verified
S on all trims; printed with the letter O; GM prints no zero form
- 2014–2018, 2022–2026 Factory-verified
- 2016–2017 Factory-verified
S on all trims; one entry for the 2.4L and one for the 3.6L V6; printed with the letter O, and GM prints no zero form
This page aggregates every documented appearance of FHO in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.