The addition of VVT to the 4.8L and 5.3L truck V-8s completes the rollout in the truck small block V-8 lineup which includes the 6.0L and 6.2L V-8s. The component that makes VVT possible is a cam phaser&mash;a simple and reliable device that attaches to the end of the camshaft. The dual equal cam phaser electro-hydraulically controls cam position with the help of a sensor and the engine control module.

When working with Active Fuel Management (cylinder deactivation) on the 5.3L V-8, variable valve timing helps deliver segment-leading fuel economy in the 2010 GMC Sierra and Chevy Silverado pickups.

The Sierra and Silverado are EPA estimated at 15 mpg city and 22 mpg highway—better than the less powerful 2010 trucks from Ford and Toyota, GM points out. (Toyota Tundra 4.6L V-8 EPA estimates 15 mpg city and 20 mpg highway. Ford F-150 292 hp 4.6L V-8 EPA estimates are 14 mpg city and 20 mpg highway.)

The majority of Chevrolet and GMC trucks have engines available with variable valve timing.