GM Trucks Add 1 MPG With “XFE” Editions (The Car Connection)

GM says a new XFE version of its big pickups and SUVs adds one mile per gallon to their fuel economy ratings, by adopting some aerodynamic and tire tweaks. The changes to the Silverado/Tahoe and Sierra/Yukon lineups improve fuel economy by 5 percent on the highway and 7 percent in the city, and improve the trucks’ coefficient of drag. The ..