Fleet free maintenance credit

Years 2015–19, 2022, 2025–27 Models 13 Factory citations 27

Also described as Fleet free maintenance credit, in place of up to 2 free maintenance visits in the first 24 months and 24,000 milesMobile Service Plus, 1 yearMobile Service PlusMobileService+, 1 yearFleet free maintenance credit, 24 months or 24,000 miles

Also documented for Cadillac Chevrolet GMC

Documented applications

Cascada — Delta II (2016–2019)

2016–2019 Factory-verified internal

; all trims: O; fleet and government order types only

GM factory document — 2016 buick cascada order guide copy gm authority, p.10.
GM factory document — 2017 buick cascada order guide copy gm authority, p.8, p.15.
GM factory document — 2018 buick cascada order guide copy gm authority, p.8, p.16.
GM factory document — 2019 buick cascada order guide copy gm authority, p.8, p.16.

Enclave — C1XX (2018–2024)

2018, 2022 Factory-verified internal

; all trims: O; fleet and government order types only; 2018: GM order guide via GM Authority; not in the 2023 guide

GM factory document — 2018 buick enclave order guide copy gm authority, p.12, p.25, p.37.
GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.15, p.33.

Enclave — VSS-S (2025–2027)

2026–2027 Factory-verified

O on all trims; dealer service conveniences: mobile service, pick-up and delivery, loaner

GM factory document — 2026 buick enclave fleet order guide, p.11.
GM factory document — 2027 buick enclave fleet order guide, p.11.

Encore — Gamma II (2013–2022)

2018–2019 Factory-verified

all trims: O; a credit in place of the free maintenance visits of the first 24 months or 24,000 miles

GM factory document — 2018 buick encore order guide copy gm authority, p.23.
GM factory document — 2019 buick encore order guide copy gm authority, p.21.

Encore GX — VSS-F (2020–2027)

2026–2027 Factory-verified

Preferred, Sport Touring, Avenir: O

GM factory document — 2026 buick encore gx fleet order guide, p.12.
GM factory document — 2027 buick encore gx fleet order guide, p.11.

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

2017–2019 Factory-verified internal

; all trims: S on fleet and government order types; a credit in place of the free oil changes, tire rotations and inspections

GM factory document — 2017 buick envision order guide copy gm authority, p.6, p.21.
GM factory document — 2018 buick envision order guide copy gm authority, p.6, p.20.
GM factory document — 2019 buick envision order guide copy gm authority, p.7, p.23.

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

2027: all trims: O

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.10.

Envista — VSS-F (2024–2027)

2026 Factory-verified

all trims: O; dealer service convenience plan; dealers with BFU 284 only

GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.9.

LaCrosse — E2XX, 3rd gen (2017–2019)

2019 Factory-verified internal

; 2019: all trims: O; fleet orders

GM factory document — 2019 buick lacrosse order guide copy gm authority, p.15.

LaCrosse — Epsilon II, 2nd gen (2010–2016)

2015 Factory-verified

2015: all groups: O; fleet and government orders

GM factory document — 2015 buick lacrosse fleet order guide wayback, p.4.

Regal — E2XX (2018–2020)

2018–2019 Factory-verified internal

; 2019: Preferred, Preferred II, Essence, Avenir, GS: O (2019 Sportback order guide); fleet and government order types only

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1, p.5.
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.15.

Regal — Epsilon II, 5th gen (2011–2017)

2016 Factory-verified internal

; 2016: 1SL, 1SN, 1SP, 1SX: O; fleet and government order types only

GM factory document — 2016 buick regal order guide copy gm authority, p.12, p.25.

Verano — Delta II (2012–2017)

2016 Factory-verified

2016: 1SD, 1SG, 1SH, 1SL, 1ST: O; fleet and government orders only, not daily rental

GM factory document — 2016 buick verano fleet order guide wayback, p.4.

This page aggregates every documented appearance of R9Y in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.