- 2015–2017 Factory-verified
2015: S on all trims
AKK Factory-verified
Also described as Glass, laminated acoustic
Also documented for BuickChevroletGMC
Documented applications
- 2023, 2025–2027 Factory-verified
2027: S on all trims
This page aggregates every documented appearance of AKK in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.