- 1987 Confirmed
1987 from conceptcarz's 1987 list (coupe); the OSG gives no year; the rparts list agrees
U63 Confirmed
Also documented for BuickCadillacChevroletGMC
Documented applications
This page aggregates every documented appearance of U63 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.