- 2018–2020, 2022–2024 Factory-verified
Essence, Premium; GM Authority names it without the code for 2021; 2018: GM order guide via GM Authority; 2019–2020, 2024: GM Authority
HKE Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of HKE in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.