PQH Factory-verified

Cadillac · Regular Production Option

OnStar Connect Plus, 48 months

Years 2016, 2026–27 Models 9 Factory citations 17

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Also described as OnStar Connect Plus plan, 48 months (fleet)OnStar Protection service, 30 months added, fleet

Also documented for Buick Chevrolet GMC

Documented applications

CT4 — Alpha 2 (2020–2026)

2026 Factory-verified

all trims: O

GM factory document — 2026 cadillac ct4 fleet order guide, p.38.
GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.39.

CT5 — Alpha 2 (2020–2026)

2026 Factory-verified

GM factory document — 2026 cadillac ct5 fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide rpo codes, p.1.

Escalade IQ — Ultium BEV (2025–2027)

2026–2027 Factory-verified

2027 guide: all trims: O

GM factory document — 2026 cadillac all electric escalade iq fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric escalade iql fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric escalade iql fleet order guide, p.55.

Escalade — T1XX, 5th gen (2021–2027)

2026–2027 Factory-verified

2027: O on all trims

GM factory document — 2026 cadillac escalade escalade v fleet order guide, p.51.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.62.

Lyriq — BEV3 (2023–2027)

2026–2027 Factory-verified

GM factory document — 2026 cadillac all electric lyriq lyriq v fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric lyriq lyriq v fleet order guide rpo codes, p.1.

Optiq — BEV3 (2025–2027)

2026–2027 Factory-verified

GM factory document — 2026 cadillac all electric optiq optiq v fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric optiq optiq v fleet order guide rpo codes, p.1.

SRX — Theta Premium / GMT166 (2010–2016)

2016 Confirmed

fleet or government order types; requires UE1; GM's 2016 SRX order guide (GM Authority's copy, published September 18, 2015)

Vistiq — BEV3 (2026–2027)

2026–2027 Factory-verified

GM factory document — 2026 cadillac all electric vistiq fleet order guide, p.55.
GM factory document — 2027 cadillac all electric vistiq fleet order guide, p.55.

XT5 — C1XX (2017–2026)

2026 Factory-verified

all trims: O

GM factory document — 2026 cadillac xt5 fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac xt5 fleet order guide, p.53.

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