Which Silverado engine is best truly depends on your driving needs. The Silverado 6.6-liter V8 engine generates up to 401 hp and 464 lb-ft of torque, and can tow as much as 18,510 pounds. If you need more power, choose the available 6.6-liter Duramax Turbo-Diesel V8 engine with 445 hp and 910 lb-ft of torque. The Silverado Duramax engine can help tow up to 36,000 pounds.