Seat adjuster, front passenger 2-way power lumbar

Years 2015–19, 2021–27 Models 8 Factory citations 31

Also described as Seat adjuster, passenger lumbar, powerSeat adjuster, front passenger, power lumbarSeat adjuster, power passenger lumbar controlSeat, front passenger power lumbarSeat adjuster, front passenger, 2-way power lumbar

Also documented for Buick Cadillac Chevrolet Oldsmobile Pontiac

Documented applications

Acadia — Second generation (C1XX) (2017–2023)

2017–2019 Factory-verified

2019 guide: SLT-1, SLT-2, Denali: S

GM factory document — 2017 gmc acadia order guide copy gm authority, p.4, p.20.
GM factory document — 2018 gmc acadia order guide copy gm authority, p.5, p.26.
GM factory document — 2019 gmc acadia order guide copy gm authority, p.5, p.28.

Acadia — Third generation (2024–2027)

2025–2027 Factory-verified

2025: AT4: S; Elevation: O; Denali: not offered; 2026–2027: AT4: S; Elevation: O; Denali, Denali Ultimate: not offered

GM factory document — 2025 gmc acadia fleet order guide, p.7.
GM factory document — 2026 gmc acadia fleet order guide, p.8.
GM factory document — 2027 gmc acadia fleet order guide, p.9.

Canyon — Second generation (GMT31XX) (2015–2022)

2015–2017, 2019, 2021–2022 Factory-verified

2015–2016: SLT: S; SLE: O; SL, Canyon: not offered; 2021: Denali: S; AT4: O; Elevation Standard, Elevation: not offered

GM factory document — 2015 gmc canyon fleet order guide wayback, p.2.
GM factory document — 2016 gmc canyon fleet order guide wayback, p.5.
GM factory document — 2017 chevrolet canyon colorado electrical body builders manual service manual 2017 en us, p.8.
GM factory document — 2019 chevrolet 19 coloradocanyon body builder sm u 2018aug01 1, p.9.
GM factory document — 2021 gmc canyon fleet order guide wayback, p.1.
GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.9.

Canyon — Third generation (VSS-T) (2023–2027)

2023–2027 Factory-verified

2025: AT4: O; Denali: included in a package; Elevation: not offered; 2026–2027: AT4: O; AT4X, Denali: included in a package; Elevation: not offered

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.10.
GM factory document — 2024 gmc 24 canyon electrical body builder manual 2023oct04, p.10.
GM factory document — 2025 gmc canyon fleet order guide, p.9.
GM factory document — 2026 gmc canyon fleet order guide, p.12.
GM factory document — 2027 gmc canyon fleet order guide, p.12.

Terrain — Second generation (D2XX) (2018–2024)

2019 Factory-verified

SLT: O; SLT Diesel: in group; Denali: S

GM factory document — 2019 gmc terrain order guide copy gm authority, p.6, p.35.

Terrain — Third generation (2025–2027)

2025–2027 Factory-verified

S: Denali (from 2026); O: Elevation, AT4 (from 2026); included in, and only available with, ZL4

GM factory document — 2025 gmc next generation terrain fleet order guide, p.14.
GM factory document — 2026 gmc next generation terrain fleet order guide, p.5.
GM factory document — 2027 gmc terrain fleet order guide, p.6.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation: S

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.9.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.9.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.6.
GM factory document — 2026 gmc yukon denali fleet order guide, p.6.
GM factory document — 2027 gmc yukon fleet order guide, p.6.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation: S

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.9.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.9.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.6.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.6.
GM factory document — 2027 gmc yukon xl fleet order guide, p.6.

This page aggregates every documented appearance of AT9 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.