Seat adjuster, driver, 4-way power lumbar

Years 2022–27 Models 5 Factory citations 20

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Also described as Lumbar, driver seat, power, 4-wayDriver seat, 4-way power lumbar

Also documented for Buick Cadillac Chevrolet

Documented applications

Acadia — Third generation (2024–2027)

2025–2027 Factory-verified

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

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

Sierra EV — BT1 (2024–2027)

2026–2027 Factory-verified

included with and only available with ZM9; 2026: S in 4SC, 4SD, 5SB, 5SC, 5SD; A in 3SC; not offered in 3SB; 2027: S in 4SC, 4SD, 5SC, 5SD; A in 3SC; not offered in 3SB

GM factory document — 2026 gmc sierra ev fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra ev fleet order guide, p.7.
GM factory document — 2027 gmc sierra ev fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra ev fleet order guide, p.7.

Sierra — T1XX (2019–2026)

2023–2025 Factory-verified

GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.10.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.11.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.9.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4, AT4 Ultimate, Denali, Denali Ultimate: S; Elevation: O

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.14.
GM factory document — 2026 gmc yukon denali fleet order guide, p.15.
GM factory document — 2027 gmc yukon fleet order guide, p.14.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4, AT4 Ultimate, Denali, Denali Ultimate: S; Elevation: O

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.14.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.15.
GM factory document — 2027 gmc yukon xl fleet order guide, p.14.

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