2025 Gmc Sierra At4x Review India. 2025 gmc sierra 1500 at4x adds torquey duramax diesel engine. The 2025 gmc sierra 2500 4wd crew cab at4x brings a delicious combination of comfort, style and brute force to market, for a price.

Neither is more or less capable than the other. I tested a 2023 gmc sierra 1500,.