E5Z / E6E / E9Z ◑ Single-source

Chevrolet · Regular Production Option

Less adapter / sleeve-speedo / less key-speedo

Years 1978 Models 1

Documented applications

Corvette (C3) →

• 1978 ◑ Single-source

  Internal build codes; no price/count

This page aggregates every documented appearance of E5Z / E6E / E9Z in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.