- 1984–1986 Confirmed
gnttype.org's production page gives WH1 production for 1984, 1985 and 1986; the wording is buickturboregal.com's, which groups WH1 with the T-Type
WH1 Confirmed
Documented applications
This page aggregates every documented appearance of WH1 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.