- 1963–70s (varies) Confirmed
D68 Factory-verified
Documented applications
- 1975–1976 Factory-verifiedGM Heritage factory kit — 1975 Chevrolet Nova, p.150.GM Heritage factory kit — 1976 Chevrolet Nova, p.64.
This page aggregates every documented appearance of D68 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.