Seats, ventilated driver and front passenger

Years 2017–19, 2022–23, 2025–27 Models 5 Factory citations 14

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Also documented for Cadillac Chevrolet GMC

Documented applications

Enclave — C1XX (2018–2024)

2018, 2022–2023 Factory-verified

Premium, Avenir: S

GM factory document — 2018 buick enclave fleet order guide wayback, p.1.
GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.6, p.24.
GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.6, p.22.

Enclave — VSS-S (2025–2027)

2025–2027 Factory-verified

Preferred, Sport Touring: not offered; Avenir: S

GM factory document — 2025 buick all new enclave fleet order guide, p.5.
GM factory document — 2026 buick enclave fleet order guide, p.5.
GM factory document — 2027 buick enclave fleet order guide, p.5.

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

2027: Avenir: S

GM factory document — 2025 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide, p.4.

LaCrosse — E2XX, 3rd gen (2017–2019)

2017–2019 Factory-verified

2019: Premium, Avenir: S

GM factory document — 2017 buick lacrosse fleet order guide wayback, p.2.
GM factory document — 2018 buick lacrosse order guide copy gm authority, p.3.
GM factory document — 2019 buick lacrosse order guide copy gm authority, p.4.

Regal — E2XX (2018–2020)

2018–2019 Factory-verified

only in: Sportback; 2019: GS: S (2019 Sportback order guide)

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1.
GM factory document — 2019 buick regal sportback order guide copy gm authority, p.4.

This page aggregates every documented appearance of KU9 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.