Vortec 5.3L Aluminum-Block V8 Engine
Vortec 5.3L aluminum-block V8 engine features:
- 315 horsepower @ 5200 rpm
- 338 lb.-ft. of torque @ 4400 rpm
- EPA estimated MPG 14 city/19 highway in 4x4 models
- Standard Hydra-Matic four-speed automatic transmission
- Lightweight yet strong deep-skirt aluminum block
- 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.