2024 Gmc Sierra At4x Hd Specs. View detailed specs, features and options for the 2024 gmc sierra 2500hd 4wd crew cab 159 at4x at u.s. Choose from either a gmc sierra 2500 hd or 3500 hd at4, and learn more about the vehicle specs, trims, and features available.

13.4 diagonal center touchscreen and 12.3 diagonal driver information center. Here’s a list of official specs for the 2024 gmc sierra hd at4x & at4x aev edition.