YA6 ● Confirmed

Chevrolet · Regular Production Option

California body CO override

Years 1970–79 Models 2

Documented applications

Camaro →

• 1970s ● Confirmed

  internal

Nova / Chevy II →

• 1975 ● Confirmed

This page aggregates every documented appearance of YA6 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.