2024 Gmc At4 Hd Specs. Select a 2025 gmc sierra at4 and at4x hd to view feature and capability specs on the official site. 2024 gmc sierra 2500hd at4x aev vehicle type:

The 2025 gmc sierra hd work truck pulls your world with turbocharged power and an impressive lineup of trims. Choose from either a gmc sierra 2500 hd or 3500 hd at4, and learn more about the vehicle specs, trims, and features available.