- 2017–2019, 2021–2022 Factory-verified
2018 from GM's 2018 Colorado order guide (PDF); 2021 from the upfitter list GM files for 2021 and 2022
S4P Factory-verified
Documented applications
This page aggregates every documented appearance of S4P in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.