P0I Factory-verified

Buick · Regular Production Option

GM Commercial Link, 3 years of service

Years 2018–19, 2026–27 Models 9 Factory citations 15

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Also described as OnStar Connect Plus, 24 monthsOnStar Connect Plus, 24 months of service

Also documented for Cadillac Chevrolet GMC

Documented applications

Cascada — Delta II (2016–2019)

2019 Factory-verified

1SP, 1SH: O; requires UE1 and a fleet or government order type

GM factory document — 2019 buick cascada order guide copy gm authority, p.22.

Enclave — VSS-S (2025–2027)

2026–2027 Factory-verified

O on all trims; fleet plan

GM factory document — 2026 buick enclave fleet order guide, p.35.
GM factory document — 2027 buick enclave fleet order guide, p.35.

Encore — Gamma II (2013–2022)

2019 Factory-verified

fleet and government orders; requires UE1

GM factory document — 2019 buick encore order guide copy gm authority, p.27.

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.40.
GM factory document — 2027 buick encore gx fleet order guide, p.38.

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

2019 Factory-verified

1SD, 1SL, 1SN, 1SP: O; requires OnStar (UE1) and a fleet or government order type

GM factory document — 2019 buick envision order guide copy gm authority, p.33.

Envision — E2XX (2021–2027)

2026–2027 Factory-verified

2027: all trims: O

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.30.

Envista — VSS-F (2024–2027)

2026 Factory-verified

all trims: O

GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.29.

LaCrosse — E2XX, 3rd gen (2017–2019)

2019 Factory-verified

2019: Preferred, Sport Touring, Essence, Premium, Avenir: O

GM factory document — 2019 buick lacrosse order guide copy gm authority, p.35.

Regal — E2XX (2018–2020)

2018–2019 Factory-verified

only in: Sportback; 2019: Preferred, Preferred II, Essence, Avenir, GS: O (2019 Sportback order guide); the 2019 guide prints POI with a letter O; P0I in the 2018 list

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1.
GM factory document — 2019 buick regal sportback order guide copy gm authority, p.36.

This page aggregates every documented appearance of P0I in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.