- 2025–2027 Factory-verified
S on all trims
SBK Factory-verified
Also documented for BuickCadillacChevrolet
Documented applications
- 2027 Factory-verified
all trims: S
- 2025–2027 Factory-verified
S on all trims
This page aggregates every documented appearance of SBK in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.