The 2025 Chevrolet Silverado 2500 HD is a pickup powerhouse with exceptional capability. Atlanta truck buyers can choose between the potent 6.6-liter V8 gas engine delivering 401 horsepower and 464 pound-feet of torque or the muscular Duramax 6.6-liter Turbo-Diesel V8 churning out an incredible 470 horsepower and 975 pound-feet of torque. Both engines are mated to a smooth-shifting Allison 10-speed automatic transmission for optimal performance.