2024 Gmc At4x Hd Specs. Meet the first ever gmc sierra heavy duty at4x and at4x aev edition,. 2024 gmc sierra 2500 at4x aev.

Building on the foundation of the revamped 2024 sierra hd, which receives fresh design updates, new availadle premium interiors and an all. Select a 2025 gmc sierra at4 and at4x hd to view feature and capability specs on the official site.