P0H ✓ Factory-verified

GMC · Regular Production Option

OnStar Connect Plus, 12 months

Years 2019, 2026–27 Models 10 Factory citations 19

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Also described as GM Commercial Link, 2 yearsGM Commercial Link, 2 years of serviceOnStar Connect Plus plan, 12 months (fleet)

Also documented for BuickCadillacChevrolet

Documented applications

Acadia — Second generation (C1XX) (2017–2023) →

• 2019 ✓ Factory-verified

  SLE-1, SLE-2, SLT-1, SLT-2, Denali: O; fleet telematics service

  ⛭ GM factory document — 2019 gmc acadia order guide copy gm authority, p.44.

Acadia — Third generation (2024–2027) →

• 2026–2027 ✓ Factory-verified

  O on all trims

  ⛭ GM factory document — 2026 gmc acadia fleet order guide, p.52.

  ⛭ GM factory document — 2027 gmc acadia fleet order guide, p.55.

Canyon — Third generation (VSS-T) (2023–2027) →

• 2026–2027 ✓ Factory-verified

  O on all trims

  ⛭ GM factory document — 2026 gmc canyon fleet order guide, p.75.

  ⛭ GM factory document — 2027 gmc canyon fleet order guide, p.76.

Sierra 1500 — Next-Generation (2027) →

• 2027 ✓ Factory-verified

  all trims: O

  ⛭ GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.123.

  ⛭ GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra HD — T1XX (2020–2027) →

• 2026–2027 ✓ Factory-verified

  Pro, SLE, SLT, AT4, AT4X, Denali, Denali Ultimate: O

  ⛭ GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.117.

  ⛭ GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.111.

Sierra — T1XX (2019–2026) →

• 2026 ✓ Factory-verified
  ⛭ GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Terrain — Second generation (D2XX) (2018–2024) →

• 2019 ✓ Factory-verified

  SLE, SLE Diesel, SLT, SLT Diesel, Denali: O; fleet orders

  ⛭ GM factory document — 2019 gmc terrain order guide copy gm authority, p.51.

Terrain — Third generation (2025–2027) →

• 2026–2027 ✓ Factory-verified

  O on all trims; fleet and government order types

  ⛭ GM factory document — 2026 gmc next generation terrain fleet order guide, p.37.

  ⛭ GM factory document — 2027 gmc terrain fleet order guide, p.38.

Yukon — T1XX (2021–2027) →

• 2026–2027 ✓ Factory-verified

  2027: O on all trims

  ⛭ GM factory document — 2026 gmc yukon denali fleet order guide, p.97.

  ⛭ GM factory document — 2027 gmc yukon fleet order guide, p.86.

Yukon XL — T1XX (2021–2027) →

• 2026–2027 ✓ Factory-verified

  2027: O on all trims

  ⛭ GM factory document — 2026 gmc yukon xl denali fleet order guide, p.97.

  ⛭ GM factory document — 2027 gmc yukon xl fleet order guide, p.88.

This page aggregates every documented appearance of P0H in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.