D4D ✓ Factory-verified

Chevrolet · Regular Production Option

Gear, speedometer driven (25513047)

Years 1990 Models 1 Factory citations 1

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Documented applications

Corvette — C4 (1984–1996) →

• 1990 ✓ Factory-verified internal
  ⛭ GM Heritage factory kit — 1990 Chevrolet Corvette, p.31.

This page aggregates every documented appearance of D4D in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.