D66 (AD) ● Confirmed

Cadillac · Regular Production Option

LH outside mirror w/ thermometer

Years 1977–78 Models 2

Also described as Outside thermometer mirrorIlluminated outside thermometer

Documented applications

DeVille / Calais →

• 1977 ● Confirmed

  RPO changed from D65

• 1978 ● Confirmed

  All

Seville →

• 1977 ● Confirmed

  $26

This page aggregates every documented appearance of D66 (AD) in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.