- 2021 Single-source
2021: machined with dark accents, AT4 (GM Authority 2021 wheels page); 2018 and 2019 are left out: those guides print it only as All Terrain (GAT) contents, 'included and only available with' the All Terrain (2018 guide p.31, 2019 guide p.33)
SSZ Single-source
Documented applications
This page aggregates every documented appearance of SSZ in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.