Grille, front shutters, active upper and lower

Years 2018–19 Models 2 Factory citations 2

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Also described as Shutters, front upper and lower grille, active

Also documented for Cadillac Chevrolet GMC

Documented applications

Enclave — C1XX (2018–2024)

2018–2019 Factory-verified

S on all trims; GM's June 2017 order guide (GM Authority) says not with the Avenir Technology Package; 2019: S on all models, from GM Authority's 2020 changes page, which drops it for 2020

GM factory document — 2018 buick enclave fleet order guide wayback, p.1.

LaCrosse — E2XX, 3rd gen (2017–2019)

2019 Factory-verified

2019: Base, Preferred, Essence: S; Premium: O; FWD only

GM factory document — 2019 buick lacrosse order guide copy gm authority, p.6.

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