Seat adjuster, front passenger 2-way power lumbar

Years 2016–19, 2022–23, 2025–27 Models 5 Factory citations 16

Also described as Seat adjuster, power lumbar control, passengerSeat adjuster, power passenger lumbar controlSeat adjuster, front passenger lumbar, 2 way power

Also documented for Cadillac Chevrolet GMC Oldsmobile Pontiac

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.2, p.6.
GM factory document — 2017 buick cascada order guide copy gm authority, p.2, p.12.
GM factory document — 2018 buick cascada order guide copy gm authority, p.2, p.12.
GM factory document — 2019 buick cascada order guide copy gm authority, p.2, p.11.

Enclave — C1XX (2018–2024)

2018, 2022–2023 Factory-verified

2018: all trims: S; 2022–2023: Essence: S (Premium and Avenir have AVU)

GM factory document — 2018 buick enclave fleet order guide wayback, p.1.
GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.5, p.23.
GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.5, p.22.

Encore GX — VSS-F (2020–2027)

2025–2027 Factory-verified

Avenir: S

GM factory document — 2025 buick encore gx fleet order guide, p.5.
GM factory document — 2026 buick encore gx fleet order guide, p.5.
GM factory document — 2027 buick encore gx fleet order guide, p.5.

LaCrosse — E2XX, 3rd gen (2017–2019)

2017–2019 Factory-verified

2019: Sport Touring, Essence: 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.5.

Regal — E2XX (2018–2020)

2018–2019 Factory-verified

2019: Essence: S (2019 Sportback order guide)

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1.
GM factory document — 2018 buick regal tourx 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 AT9 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.