U.S. Department of Energy - Energy Efficiency and Renewable Energy

Vehicle Technologies Office – Advanced Vehicle Testing Activity

Chevrolet Silverado Hybrid Electric Vehicle Accelerated Reliability Testing – April 2009

Two Chevrolet Silverado hybrid electric vehicles (HEVs) entered accelerated reliability testing in one fleet in Arizona during September 2004. After reaching 160,000 miles each, the two HEVs will have their traction batteries tested before being retired.

Fact sheets and maintenance logs for these vehicles give detailed information such as miles driven, fuel economy, operations and maintenance requirements, operating costs, and life-cycle costs.

The two Silverado HEVs (one is four-wheel-drive and one is two-wheel-drive) have been driven a total of 320,876 miles and the cumulative average fuel economy for the two Silverado HEVs is 17.9 miles per gallon. The 2x2 Silverado HEV is averaging 18.0 mpg after 160,539 miles and the 4x4 Silverado HEV is averaging 17.8 mpg after 160,337 miles. Note that neither vehicle operated during September 2007, so September 2007 is not reported.

Graph showing that the cumulative average fuel economy of the Chevrolet Silverado Test Fleet is 17.9 miles per gallon.
Graph showing that the Chevrolet Silverado Test Fleet has been driven a total of 320,876 miles with an average of just over 6,000 miles per month.