GS4 ◑ Single-source

Chevrolet · Regular Production Option

3.70 axle ratio

Years 1963–79 Models 2

Documented applications

Corvette (C3) →

• 1978 ◑ Single-source

  No price/count listed

Impala / Full-Size →

• 1963–70s (varies) ◑ Single-source

  Positraction

This page aggregates every documented appearance of GS4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.