Corvette concepts on display this week at Bowling Green museum

OK, Corvette lovers, here's your chance to view some all-time classic concepts. The 1961 Mako Shark Concept, the 1965 Manta Ray Concept, 1973 Aerovette Concept and 1959 Stingray Racer are all on display this week at the National Corvette Museum in Bowling Green, Ky. It's celebrating its 15th anniversary by showcasing the four concept Corvettes.

GM delays second shift at Volt plant

General Motors is delaying the addition of a second shift at its Michigan assembly plant that makes the Chevrolet Volt. In May, GM said that it would add a second shift at its Detroit-Hamtramck plant by late this fall to double Volt production. Instead, a plant overhaul completed this summer, along with a more-modest addition of workers, will allow GM to double production starting early next year while remaining on one shift, the company said Friday.

$5 billion competition on to replace Humvee

Competition is heating up to win a contract for a vehicle that will replace nearly 18,500 aging military Humvees for the U.S. Army and Marine Corps starting in 2015. Six proposals are in play, with little time left before federal contracting officials decide on development of the $5 billion-plus program.