Seat, rear, 60/40 split-folding, adjustable outboard head restraints, integrated center headrest

Years 2012, 2016, 2018–19, 2025–27 Models 5 Factory citations 15

Also described as Seat, rear 40/60 split-bench, folding (60 percent on passenger side)Seat, rear 40/60 split-benchSeat, rear 40/60 split-bench, folding, 60 percent on passenger sideSeat, rear 60/40 split-folding

Also documented for Chevrolet GMC

Documented applications

Encore GX — VSS-F (2020–2027)

2025–2027 Factory-verified

Preferred, Sport Touring, Avenir: S

GM factory document — 2025 buick encore gx fleet order guide, p.4.
GM factory document — 2026 buick encore gx fleet order guide, p.4.
GM factory document — 2027 buick encore gx fleet order guide, p.4.

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

2027: all trims: S

GM factory document — 2025 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide, p.4.

Envista — VSS-F (2024–2027)

2025–2026 Factory-verified

all trims: S

GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2025 buick envista fleet order guide, p.3.
GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.3.

Regal — E2XX (2018–2020)

2018–2019 Factory-verified

2019: Regal, Preferred: S (2019 Sportback order guide)

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1.
GM factory document — 2018 buick regal tourx fleet order guide wayback, p.1.
GM factory document — 2019 buick regal sportback order guide copy gm authority, p.4.

Verano — Delta II (2012–2017)

2012, 2016 Factory-verified

2016: all trims: S; 2012: GM 2012 ordering guide, all trims: S

GM factory document — 2016 buick verano fleet order guide wayback, p.2.
GM factory document — 2012 buick verano online ordering guide copy gm authority, p.2.

This page aggregates every documented appearance of A64 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.