- 2011 Confirmed
2011: deleted for 2012 per GM Authority 2012 RPO list
UDC Factory-verified
Also documented for ChevroletGMC
Documented applications
- 2013 Confirmed
deleted for 2014 (GM's 2014 list)
- 2012, 2016 Factory-verified
2016: all trims: S; 2012: GM 2012 ordering guide, all trims: S
This page aggregates every documented appearance of UDC in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.