- 2014 Single-source
GM Authority 2015 changes prints H1R and H1S together for this color, so the meaning of each code alone is unknown; deleted for 2015; 2014 is single-source (GM Authority 2015 changes does not credit GM)
H1R Single-source
Documented applications
This page aggregates every documented appearance of H1R in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.