2024 Gmc At4 Hd Specs. View detailed specs, features and options for the 2024 gmc sierra 2500hd 4wd crew cab 172 at4 at u.s. Select a 2025 gmc sierra at4 and at4x hd to view feature and capability specs on the official site.

13.4 diagonal centre touchscreen and 12.3 diagonal driver information centre. View information about specs and features.