UP4 (A6) ● Confirmed

Cadillac · Regular Production Option

AM/FM stereo w/ CB

Years 1977 Models 2

Documented applications

DeVille / Calais →

• 1977 ◑ Single-source

  New

Seville →

• 1977 ● Confirmed

  New, $230

This page aggregates every documented appearance of UP4 (A6) in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.