- 2018–2019 Factory-verified
only in: Sportback; 2019: GS: S (2019 Sportback order guide); the 2019 guide reads sport, flat bottom
N55 Factory-verified
Also described as Steering wheel, leather-wrapped, 3-spoke
Documented applications
- 2016 Factory-verified
2016: 1SX: S
This page aggregates every documented appearance of N55 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.