AT4 Reserve Package

Years 2027 Models 1 Factory citations 1

Documented applications

Acadia — Third generation (2024–2027)

2027 Factory-verified

AT4: O; Elevation, Denali, Denali Ultimate: not offered; includes WPL, WQ1, UQP, RIA, RIB, VLI, VQK and RV1

GM factory document — 2027 gmc acadia fleet order guide, p.15.

This page aggregates every documented appearance of GZ4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.