Y-codes (Royale Brougham, Regency trim) ◑ Single-source

Oldsmobile · Regular Production Option

Trim packages; "Royale Brougham" interior debuts 1979

Years 1979–82 Models 1

Documented applications

Full-Size 88 / 98 →

• 1979–82 ◑ Single-source

  Specific codes not documented in consulted sources

  Grade note: gap

This page aggregates every documented appearance of Y-codes (Royale Brougham, Regency trim) in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.