D3E / E5Z / E7B / E9Z ◑ Single-source

Chevrolet · Regular Production Option

Speedometer drive-gear service codes

Years 1973–82 Models 1

Documented applications

C/K Trucks →

• 1973–82 ◑ Single-source

  Axle/tire matching, not customer options

This page aggregates every documented appearance of D3E / E5Z / E7B / E9Z in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.