- 2022–2023 Factory-verified
all trims: S
FHO Factory-verified
Also described as E10 fuel capable
Also documented for ChevroletGMC
Documented applications
- 2025–2027 Factory-verified
S on all trims
This page aggregates every documented appearance of FHO in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.