- 2015–2019 Factory-verified
2015: Z71: S; WT, LT: O; Base: not offered; 2017: Z71: S; WT, LT: O; Base: not offered; with LFX (2015), LGZ or LWN (2017); 2018 from GM's 2018 Colorado order guide (PDF)
S1K Factory-verified
Also documented for GMC
Documented applications
This page aggregates every documented appearance of S1K in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.