GMC Sierra Owners Manual

Active Fuel Management
Driving and Operating / Starting and Operating / Active Fuel Management

Vehicles with V8 engines may have Active Fuel Management. This system allows the engine to operate on either all or half of its cylinders, depending on the driving conditions.

When less power is required, such as cruising at a constant vehicle speed, the system will operate in the half cylinder mode, allowing the vehicle to achieve better fuel economy. When greater power demands are required, such as accelerating from a stop, passing, or merging onto a freeway, the system will maintain full-cylinder operation.

If the vehicle has an Active Fuel Management indicator, see Driver Information Center (DIC) on page 5‑33 for more information on using this display.


2018 www.gmcmaster.com. All Rights Reserved.