AVK ✓ Factory-verified

Buick · Regular Production Option

Seat adjuster, driver 4-way power lumbar

Years 2018–19, 2022–23, 2025–27 Models 4 Factory citations 11

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Also described as Seat adjuster, driver 4-way power lumbar, with massage

Also documented for CadillacChevroletGMC

Documented applications

Enclave — C1XX (2018–2024) →

• 2022–2023 ✓ Factory-verified

  Premium, Avenir: S

  ⛭ GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.5, p.23.

  ⛭ GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.5, p.22.

Enclave — VSS-S (2025–2027) →

• 2025–2027 ✓ Factory-verified

  S on all trims

  ⛭ GM factory document — 2025 buick all new enclave fleet order guide, p.4.

  ⛭ GM factory document — 2026 buick enclave fleet order guide, p.5.

  ⛭ GM factory document — 2027 buick enclave fleet order guide, p.5.

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.

Regal — E2XX (2018–2020) →

• 2018–2019 ✓ Factory-verified

  2019: Avenir, GS: S; Essence: O (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.

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