Driver Alert Package II, with head-up display

Years 2016–17, 2020, 2025–27 Models 3 Factory citations 5

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Also described as AT4 Premium packageDriver Alert package I

Also documented for Chevrolet

Documented applications

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

2020 Single-source

only on SLT (GM Authority); 2020: GM Authority 2020 changes page

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

2025–2027 Factory-verified

2025: AT4: O; Elevation, Denali: not offered; 2026–2027: AT4: O; Elevation, AT4X, Denali: not offered

GM factory document — 2025 gmc canyon fleet order guide, p.12.
GM factory document — 2026 gmc canyon fleet order guide, p.15.
GM factory document — 2027 gmc canyon fleet order guide, p.15.

Terrain — First generation (2010–2017)

2016–2017 Factory-verified

SLE-2: O (included with PDC); SLT: O (with TB5 and UG1); includes UFT, UFG and UD7; the 2016 guide marks it new

GM factory document — 2016 gmc terrain fleet order guide wayback, p.2.
GM factory document — 2017 gmc terrain fleet order guide wayback, p.2.

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