Grille shutters, active, upper and lower

Years 2017–20, 2022–27 Models 9 Factory citations 35

Also described as Grille, active shutters, upper and lowerRadiator grille shutters, automaticActive aero shutters, upper and lowerShutters, front upper and lower grille, active

Also documented for Buick Cadillac Chevrolet

Documented applications

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

2017–2019 Factory-verified

2019 guide: SL, SLE-1, SLE-2, SLT-1: S; SLT-1 standard on FWD only; the 2019 guide reads active aero shutters

GM factory document — 2017 gmc acadia order guide copy gm authority, p.5, p.22.
GM factory document — 2018 gmc acadia order guide copy gm authority, p.7, p.29.
GM factory document — 2019 gmc acadia order guide copy gm authority, p.6, p.30.

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

2023–2027 Factory-verified

S on all trims

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.13.
GM factory document — 2024 gmc canyon fleet order guide wayback, p.1.
GM factory document — 2025 gmc canyon fleet order guide, p.6.
GM factory document — 2026 gmc canyon fleet order guide, p.8.
GM factory document — 2027 gmc canyon fleet order guide, p.8.

Hummer EV Pickup (2022–2027)

2025–2026 Factory-verified

GM factory document — 2025 gmc hummer ev pickup fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc hummer ev pickup fleet order guide rpo codes, p.1.

Hummer EV SUV — BT1 (2024–2027)

2025–2026 Factory-verified

GM factory document — 2025 gmc hummer ev suv fleet order guide, p.5.
GM factory document — 2026 gmc hummer ev suv fleet order guide, p.5.

Sierra EV — BT1 (2024–2027)

2025–2027 Factory-verified

GM factory document — 2025 gmc sierra ev denali fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra ev denali fleet order guide, p.5.
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.9.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2025 Factory-verified

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.15.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.16.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.15.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.16.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.18.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.16.

Terrain — Third generation (2025–2027)

2025–2027 Factory-verified

S on all trims

GM factory document — 2025 gmc next generation terrain fleet order guide, p.4.
GM factory document — 2026 gmc next generation terrain fleet order guide, p.6.
GM factory document — 2027 gmc terrain fleet order guide, p.7.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, Denali, Denali Ultimate: O

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.13.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.13.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.59.
GM factory document — 2026 gmc yukon denali fleet order guide, p.64.
GM factory document — 2027 gmc yukon fleet order guide, p.55.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, Denali, Denali Ultimate: O

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.13.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.13.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.62.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.64.
GM factory document — 2027 gmc yukon xl fleet order guide, p.55.

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