Special serial-number (VIN) plate

Years 1963–79 Models 2

Also described as Special VIN plate

Documented applications

Impala / Full-Size

1963–70s (varies) Single-source

C/K Trucks

1963–66 Single-source

Export/special (kit Z-series pp.20 are mostly GVW-rating plates; Z55 line garbled)

This page aggregates every documented appearance of Z55 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.