AT4 8-Passenger Premium Off-Road Package

Years 2025–27 Models 4 Factory citations 9

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Also described as LPO, Denali Black EditionLPO, bedslide carrier and power truck bed cover package

Also documented for Buick Chevrolet

Documented applications

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

2025–2027 Factory-verified

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

GM factory document — 2025 gmc canyon fleet order guide, p.13.
GM factory document — 2026 gmc canyon fleet order guide, p.17.
GM factory document — 2027 gmc canyon fleet order guide, p.17.

Hummer EV Pickup (2022–2027)

2025–2026 Factory-verified

GM factory document — 2025 gmc hummer ev pickup fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc hummer ev pickup fleet order guide rpo codes, p.1.

Yukon — T1XX (2021–2027)

2025–2026 Factory-verified

2026: AT4: O; includes UKL, NHT, Z6E, C3U, B3L

GM factory document — 2025 gmc new yukon denali fleet order guide, p.21.
GM factory document — 2026 gmc yukon denali fleet order guide, p.23.

Yukon XL — T1XX (2021–2027)

2025–2026 Factory-verified

2026: AT4: O; includes UKL, NHT, Z6E, C3U, B3L

GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.21.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.23.

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