Concept Car of the Week: Dodge M4S PPG Turbo Interceptor (1985)

As a major paint supplier of Detroit's big three, PPG would commission every year a car to be used as a pace car in the Indy Car World Series. In 1984 Chrysler began the development of a mid-engined, rear-wheel drive car using an experimental powertrain. To avoid the costs of creating a whole new chassis, the M4S is based on a modified Huffaker tubular chassis with full roll cage taken from the Pontiac Fiero IMSA race car, only lengthened to a 100-inch wheelbase.

Cadillac launches four-year maintenance program for all 2011 models

America's luxury brands are seemingly engaging in a game of high-stakes maintenance. Days after Lincoln launched a three-year/45,000-mile program for new cars bought or leased this summer, Cadillac has upped the ante. Cadillac is offering four years or 50,000 miles, besting Lincoln in time and travel.

General Motors spending $131 million to upgrade Corvette plant

General Motors is spending $131 million on its Bowling Green, Ky., assembly plant to prepare it to build the next-generation Corvette. The plant will spend the money on manufacturing equipment, specialized tooling and plant updates, said Mark Reuss, GM's president of North America. The plant will add about 250 jobs, which will boost its workforce by about 50 percent, to about 750 workers.