Horsepower 2024 At4 Gmc 6.6. 2024 gmc sierra 1500 at4 in sterling metallic (a $495 color option) 2024 gmc sierra 1500 at4 specs. 13.4 diagonal center touchscreen and 12.3 diagonal driver information center.

Choose from either a gmc sierra 2500 hd or 3500 hd at4, and learn more about the vehicle specs, trims, and features available. 2024 gmc sierra hd at4x, at4 and at4xaev exteriors.