Interior trim, Ebony, perforated leather

Years 2015, 2017–20, 2025–27 Models 4 Factory citations 7

Also described as Interior trim, Ebony with Ebony accents, perforated leatherInterior trim, Ebony seats with Ebony interior accents, quilted and perforated leather-appointed with piping

Also documented for Cadillac Chevrolet GMC

Documented applications

Enclave — C1XX (2018–2024)

2019–2020 Confirmed

only in: Avenir; added for 2019; GM Authority names it without the code for 2021; 2019–2020: GM Authority

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

only in: Avenir (1SU); seat A51 front bucket; colour availability varies by paint (see the color and trim page)

GM factory document — 2025 buick envision fleet order guide, p.22.
GM factory document — 2026 buick envision fleet order guide, p.24.
GM factory document — 2027 buick envision fleet order guide, p.24.

LaCrosse — E2XX, 3rd gen (2017–2019)

2017–2019 Factory-verified

Essence, Premium; Sport Touring in 2019

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.

LaCrosse — Epsilon II, 2nd gen (2010–2016)

2015 Factory-verified

1SP, 1SR

GM factory document — 2015 buick lacrosse fleet order guide wayback, p.1.

This page aggregates every documented appearance of H1Y in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.