- 2018, 2022–2023 Factory-verified
S on all trims
ZCD Factory-verified
Also described as Tire, compact spare, T135/70R18 blackwall
Also documented for CadillacChevroletGMC
Documented applications
- 2025–2027 Factory-verified
S on all trims
This page aggregates every documented appearance of ZCD in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.