- 2018–2020 Factory-verified
2019 guide: SLE-1, SLE-2, SLT-1, SLT-2, Denali: O; 2020: GM Authority's 2020 changes page calls it new; 2020: GM Authority 2020 changes page
5ZI Factory-verified
Documented applications
This page aggregates every documented appearance of 5ZI in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.