Seat, second row, 1-touch flat folding, 1-touch tipping and sliding for third row access

Years 2016–19, 2025–27 Models 2 Factory citations 7

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Also described as Seat, rear, one-touch flat-folding, with release levers in the cargo area

Also documented for Cadillac Chevrolet GMC

Documented applications

Enclave — VSS-S (2025–2027)

2025–2027 Factory-verified

Preferred, Sport Touring: O; Avenir: S; fold switches in the rear cargo area; tip-and-slide buttons on the side and back of the seats

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

Envision — D2XX, imported from China (2016–2020)

2016–2019 Factory-verified

all trims: S

GM factory document — 2016 buick envision order guide copy gm authority, p.3, p.13.
GM factory document — 2017 buick envision order guide copy gm authority, p.4, p.16.
GM factory document — 2018 buick envision order guide copy gm authority, p.4, p.16.
GM factory document — 2019 buick envision order guide copy gm authority, p.4, p.18.

This page aggregates every documented appearance of A9U in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.