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.
See also:
Replacing the Engine Air Cleaner/ Filter
1. Locate the air cleaner/filter assembly. See Engine Compartment Overview on page 10‑6.
2. Loosen the four screws on the cover of the housing and lift up the cover.
3. Remove the engine a ...
Introduction
The names, logos, emblems, slogans, vehicle model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, GMC, the GMC Truck Emblem, and SIERRA are ...
Grade Braking (6-Speed Automatic Transmission)
The Grade Braking shift modes can be activated by pressing the button on the end of the shift control lever.
While in Range Selection Mode, Grade Braking is deactivated allowing the driver to select ...