UK4 ✓ Factory-verified

Buick · Regular Production Option

Radio, AM/FM stereo, electronically tuned, seek and scan

Years 1987, 2016–19, 2025–27 Models 3 Factory citations 8

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Also described as Tire pressure displayTire Pressure Display, by tire

Also documented for ChevroletGMC

Documented applications

Cascada — Delta II (2016–2019) →

• 2016–2019 ✓ Factory-verified

  all trims: S

  ⛭ GM factory document — 2016 buick cascada order guide copy gm authority, p.3, p.7.

  ⛭ GM factory document — 2017 buick cascada order guide copy gm authority, p.3, p.12.

  ⛭ GM factory document — 2018 buick cascada order guide copy gm authority, p.3, p.12.

  ⛭ GM factory document — 2019 buick cascada order guide copy gm authority, p.3, p.12.

Encore GX — VSS-F (2020–2027) →

• 2025–2027 ✓ Factory-verified

  Preferred, Sport Touring, Avenir: S

  ⛭ GM factory document — 2025 buick encore gx fleet order guide, p.6.

  ⛭ GM factory document — 2026 buick encore gx fleet order guide, p.6.

  ⛭ GM factory document — 2027 buick encore gx fleet order guide, p.6.

Regal — G-body (1983–1987) →

• 1987 ✓ Factory-verified

  gnttype.org's 1987 option sheet; shared G-body code, cited from the Monte Carlo kit

  ⛭ GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.

This page aggregates every documented appearance of UK4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.