Sales of Hulking Pickups and S.U.V.s Sag as Fuel Prices Soar

Sales of big pickup trucks and sport utility vehicles have dipped as more Americans buy hybrids and smaller cars.Sales of the Chevrolet Silverado were up, but the growth came from a light-duty version of the truck. Sales of heavy-duty Silverados slumped as Americans shift away from full-size pickups and S.U.V.s.