4-Speed Automatic with Overdrive. Look! Look! Look! Oh yeah! Imagine yourself behind the wheel of this reliable 2011 Chevrolet Silverado 1500. It is nicely equipped with features such as 4-Speed Automatic with Overdrive. US News named their pick for 2011 Best Full Size Truck for the Money. New Car Test Drive said, "...a smooth ride and confident handling while delivering superior capability and power...among the smoothest riding and quietest of all full-size pickups, and can be counted on to get the job done..." A quiet cabin with lasting supportive seating and extra legroom offer occupant comfort.