Active aero shutters, upper and lower

Years 2018–19, 2022–27 Models 6 Factory citations 27

Also described as Radiator grille shutters, automaticShutters, front upper and lower grille, activeGrille shutters, active, upper and lower

Also documented for Buick Cadillac GMC

Documented applications

Colorado — Third generation (2023–2027)

2023–2027 Factory-verified

S on all trims

GM factory document — 2023 chevrolet 23colorado electrical body builder, p.14.
GM factory document — 2024 chevrolet 24colorado electrical body builder manual 18272478 2023oct09, p.15.
GM factory document — 2025 chevrolet colorado fleet order guide, p.50.
GM factory document — 2026 chevrolet colorado fleet order guide, p.56.
GM factory document — 2027 chevrolet colorado fleet order guide, p.55.

Equinox — Fourth generation (2025–2027)

2025–2027 Factory-verified

S on all trims

GM factory document — 2025 chevrolet all new equinox fleet order guide, p.5.
GM factory document — 2026 chevrolet equinox fleet order guide, p.6.
GM factory document — 2027 chevrolet equinox fleet order guide, p.5.

Silverado EV — BT1 (2024–2027)

2025–2027 Factory-verified

GM factory document — 2025 chevrolet silverado ev fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet silverado ev fleet order guide rpo codes, p.1.
GM factory document — 2025 chevrolet silverado ev fleet order guide, p.7.
GM factory document — 2026 chevrolet silverado ev fleet order guide, p.10.
GM factory document — 2027 chevrolet silverado ev fleet order guide, p.9.

Suburban — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: LT, RST, Premier, High Country: O

GM factory document — 2025 chevrolet new suburban fleet order guide, p.45.
GM factory document — 2026 chevrolet suburban fleet order guide, p.48.
GM factory document — 2027 chevrolet suburban fleet order guide, p.45.
GM factory document — 2022 chevrolet 22 suburban tahoe electrical body builder sm u 2021oct08, p.14.
GM factory document — 2023 chevrolet 23 suburban tahoe electrical body builder sm en us 2022sep13, p.14.
GM factory document — 2026 chevrolet suburban tahoe electrical body builder manual service manual 2026 en us, p.10.

Tahoe — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: LT, RST, Premier, High Country: O

GM factory document — 2025 chevrolet new tahoe retail and fleet fleet order guide, p.59.
GM factory document — 2026 chevrolet tahoe retail and fleet fleet order guide, p.63.
GM factory document — 2027 chevrolet tahoe retail and fleet fleet order guide, p.58.
GM factory document — 2022 chevrolet 22 suburban tahoe electrical body builder sm u 2021oct08, p.14.
GM factory document — 2023 chevrolet 23 suburban tahoe electrical body builder sm en us 2022sep13, p.14.
GM factory document — 2026 chevrolet suburban tahoe electrical body builder manual service manual 2026 en us, p.10.

Traverse — C1XX (2018–2024)

2018–2019 Factory-verified

L, LS (1FL), LS, LT Cloth (2FL), LT Cloth, LT Leather, RS, Premier: S; GM Authority's 2020 changes page lists their deletion without the code

GM factory document — 2018 chevrolet traverse order guide copy gm authority, p.14, p.50.
GM factory document — 2019 chevrolet traverse order guide copy gm authority, p.16, p.72.
2024 Single-source

decoderpo.com's 2024 Traverse Limited order guide page lists it on its Standart Equipment tab (1LS); the page is a T3 mirror of GM's guide and the repository holds no GM document for 2024

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