Vortec 5.3L V8 Engine With Active Fuel Management™ Technology

Available on all LT models, the Gen IV Vortec 5.3L V8 engine features Active Fuel Management™ technology that seamlessly deactivates four of the eight cylinders when extra power is not needed. The Gen IV Vortec 5.3L V8 generates 300 hp and 321 lb.-ft. of torque.

With Active Fuel Management™ technology from GM, power is delivered when you need it.
In plain terms, the engine moves from eight cylinders to four cylinders and back again, making it a powerplant that delivers both power and efficiency.
In situations where extra power is not needed, such as cruising down the highway on level roads, Active Fuel Management™ deactivates four of the eight cylinders with seamless precision.
When load demands increase, such as when the vehicle accelerates or travels uphill, cylinders are reactivated to provide eight-cylinder operation.
The powerful 32-bit Engine Control Module (ECM) triggers cylinder deactivation based on inputs from vehicle sensors — making deactivation virtually undetectable.
The bottom line: The Gen IV Vortec 5.3L V8 is more efficient in providing the energy to move the vehicle when only four of the eight cylinders are operating.

close window