Engine 5.3l Ecotec3 V8 (355 HP [265 KW] @ 5600 RPM 383 Lb-ft OF Torque [518 NM] @ 4100 Rpm); Featuring Available Dynamic Fuel Management That Enables THE Engine TO Operate IN 17 Different Patterns Between 2 AND 8 Cylinders Depending ON Demand TO Optimize Power Delivery AND Efficiency