OnStar One, 3 years

Years 2022–23, 2025–27 Models 5 Factory citations 12

Query this via API →

Also described as OnStar and Connected Services Plan, 3 years

Also documented for Cadillac Chevrolet GMC

Documented applications

Enclave — C1XX (2018–2024)

2022–2023 Factory-verified

all trims: O; 2022: standard on retail orders, available on fleet and government orders; 2023: available on fleet and government orders, required on most retail orders from June production

GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.12, p.22.
GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.11, p.21.

Enclave — VSS-S (2025–2027)

2025–2027 Factory-verified

2025: O on all trims; 2026–2027: Preferred, Sport Touring: O; Avenir: S; included with Super Cruise (UKL); the 2025 guide words it as 3 Years of OnStar Digital Services, Safety Services, Wi-Fi, In-Vehicle Apps

GM factory document — 2025 buick all new enclave fleet order guide, p.18.
GM factory document — 2026 buick enclave fleet order guide, p.4.
GM factory document — 2027 buick enclave fleet order guide, p.4.

Encore GX — VSS-F (2020–2027)

2026–2027 Factory-verified

Avenir: S

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)

2026–2027 Factory-verified

2027: Avenir: S

GM factory document — 2026 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.3.

Envista — VSS-F (2024–2027)

2026 Factory-verified

Avenir: S; requires OnStar

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

This page aggregates every documented appearance of R9M in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.