Vortec 5.3L Iron-Block V8 Engine

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Vortec 5.3L iron-block V8 engine features:

• From the family of redesigned Gen IV Vortec V8 engines
• 315 horsepower @ 5200 rpm
• 338 lb.-ft. of torque @ 4400 rpm
• EPA estimated 16 city/22 highway MPG in 2WD models
• EPA estimated 16 city/20 highway MPG 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 provides outstanding throttle response, greater reliability and improved efficiency
• A faster, smarter Engine Control Module with more memory that better 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 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

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