Vacuum remote trunk release

Years 1963–79 Models 2

Also described as Vacuum trunk opener

Documented applications

Camaro

(1967–1968, canceled) Single-source

issued and canceled both years; dealer-installed only

Impala / Full-Size

1963–70s (varies) Confirmed

This page aggregates every documented appearance of A91 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.