Vortec 8100 V8

• Standard 225 hp @ 3600 rpm & 350 lb.-ft. of torque @ 1200 rpm
• Available HighOutput 325 hp @ 4000 rpm & 450 lb.-ft. of torque @ 2800 rpm
• A coolant-loss protection feature allows the engine to be driven a limited distance at a reduced speed to help the driver reach a service facility
• Internal balancing reduces stress on the high-capacity crankshaft
• Equal-length runners in the intake manifold help provide efficient combustion
• The exhaust manifolds are made of stainless steel to help resist corrosion.
• Accessory belts are designed to operate up to 150,000 miles before replacement (2)
• Platinum-tip spark plugs can travel up to 100,000 miles before they're scheduled to be replaced (2)
• Engine coolant won't require replacement for up to five years or 150,000 miles (whichever comes first) (2)
• Strong engine design helps provide rigidity and durability
• Sequential Fuel Injection is designed for optimum combustion
• Cooling system is designed to provide durable performance
• Lubrication is driven off the crankshaft to help meet the heavy demands of towing and hauling

Duramax Diesel 6600 V8

• Standard 210 horsepower @ 2750 rpm & 520 lb.-ft. of torque @ 1800 rpm
• Available HighOutput 300 hp @ 3000 rpm & 520 lb.-ft. of torque @ 1800 rpm
• Common rail fuel injection, developed by Bosch, is a precise injection system that optimizes fuel injection rates for reduced combustion noise.
• Direct injection with pilot injection delivers precise amounts of fuel to each cylinder to help reduce emissions and
  noise levels.
• Fracture-split alloy connecting rods increase durability.
• An integral engine oil cooler optimizes water flow through the oil cooler, providing cooler oil to the engine throughout the operating range.
• The cylinder heads are constructed of strong, lightweight aluminum which helps dissipate heat.