Vortec 5.3L Iron-Block V8 Engine

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Vortec 5.3L iron-block V8 engine features:

• 315 horsepower @ 5200 rpm
• 338 lb.-ft. of torque @ 4400 rpm
• EPA estimated MPG 15 city/20 highway in 2WD models
• EPA estimated MPG 14 city/19 highway in 4x4 models
• Standard Hydra-Matic four-speed automatic transmission
• A cast-iron crankshaft with undercut and rolled fillets
• Cast-aluminum cylinder heads that feature a low-friction roller-rocker valvetrain
• Electronic Throttle Control that provides outstanding throttle response, greater reliability and improved efficiency
• A fast, smart Engine Control Module with plenty of
  memory synchronizes the multitude of engine operations that occur every split second
• A thermoplastic composite intake manifold that helps keep the air intake cool, and equal-length runners feature smooth interior passages to promote high-speed airflow to each cylinder
• Hydraulic engine mounts for improved vibration isolation
• A coil-near-plug ignition system for a precise delivery of high-energy spark
• A coolant-loss protection feature that allows the Silverado to be driven a limited distance at a reduced speed in order to reach a service facility even if a catastrophic reduction in the coolant level has occurred
• Extended-life spark plugs and engine coolant(1)

1 Maintenance needs vary with different uses and driving conditions. See the Owner's Manual for more information.