- 1990 Single-source
Wikipedia: the 1990 Select Sixty convertibles carried white 16 inch wheels; the Reatta Owners Journal prints "N60 - Aluminum wheels, painted (16 inch white wheels)" without a year; matched by meaning
N60 Single-source
Also documented for ChevroletGMCOldsmobilePontiac
Documented applications
This page aggregates every documented appearance of N60 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.