- 2018–2019, 2021–2022 Factory-verified
Z71; the 2018 guide reads leather-appointed, Jet Black; the upfitter lists read leather, level 1, with Iced Blue accents; 2018 from GM's 2018 Colorado order guide (PDF); 2021 from the upfitter list GM files for 2021 and 2022
HH3 Factory-verified
Also documented for Hummer
Documented applications
This page aggregates every documented appearance of HH3 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.