- 2018–2019 Factory-verified
all trims: O; not with PDC or PDH; the 2018 guide calls them all-weather floor mats
S55 Factory-verified
Also documented for Buick
Documented applications
This page aggregates every documented appearance of S55 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.