Vortec 6.0L V8 Engine

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Vortec 6.0L V8 engine features:

• Thundering 353 hp @ 5400 rpm (312 hp @ 4400 rpm in 3500HD Big Dooley models)
• Class-leading standard heavy-duty horsepower in 2500HD and 3500HD Single Rear-Wheel models(1)
• 373 lb.-ft. of torque @ 4400 rpm
• High-speed air movement deep inside the combustion chamber, which generates an ideal fuel-to-air mixture
• Variable Valve Timing (VVT) technology that optimizes combustion, enhances low-end torque and high-end power, promotes efficiency, and helps lower emissions
• A cast-iron crankshaft with undercut and rolled fillets
• A thermoplastic composite intake manifold that helps keep the air intake cool, and equal-length runners that feature smooth interior passages to promote high-speed airflow to each cylinder
• Electronic Throttle Control that provides outstanding throttle response, greater reliability and improved efficiency
• Hydraulic engine mounts for improved vibration isolation
• A faster, smarter Engine Control Module with more memory that better synchronizes the multitude of engine operations that occur every split second
• A coil-near-plug ignition system for a precise delivery of high-energy spark

1 Based on 2007 GM Large Pickup segment and latest available competitive information. Excludes other GM vehicles.