- 1984 Factory-verified
all models; includes D33; the 1985 sheet (p.40) prints the entry with no code
GM Heritage factory kit — 1984 Chevrolet Caprice, p.38.
DF3 Factory-verified
Also documented for Cadillac
Documented applications
This page aggregates every documented appearance of DF3 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.