HY4 ✓ Factory-verified

Buick · Regular Production Option

Interior trim, Light Neutral with Dark Brown accents, leatherette

Years 2017–19 Models 1 Factory citations 3

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Documented applications

LaCrosse — E2XX, 3rd gen (2017–2019) →

• 2017–2019 ✓ Factory-verified

  Base, Preferred

  ⛭ GM factory document — 2017 buick lacrosse fleet order guide wayback, p.1.

  ⛭ GM factory document — 2018 buick lacrosse order guide copy gm authority, p.21.

  ⛭ GM factory document — 2019 buick lacrosse order guide copy gm authority, p.31.

This page aggregates every documented appearance of HY4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.