AU4 (AL) ● Confirmed

Cadillac · Regular Production Option

Automatic door locks

Years 1977–78 Models 1

Documented applications

DeVille / Calais →

• 1977 ● Confirmed

  All

• 1978 ● Confirmed

  All

This page aggregates every documented appearance of AU4 (AL) in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.