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Jeep Grand Cherokee's 2013 model year will be short

The Jeep Grand Cherokee will have a shortened 2013 model year so that in January the Chrysler Group can introduce a diesel engine and eight-speed automatic transmission for the 2014 model, internal Chrysler sources say. Dealer orders for 2013 Grand Cherokees began this month. The 2013 model, which will begin production in August, will continue with the five-speed automatic that the Grand Cherokee has had since mid-2010.

High Country trim tops out 2014 Chevrolet Silverado lineup

The Chevrolet Silverado lineup has expanded for 2014, adding a High Country trim that tops out the pickup's lineup with a chrome exterior and premium engine option. Pricing hasn't been released, but the current Chevy Silverado tops out with the Z71 and LTZ trim, which can carry prices in the mid-$40,000 range. The High Country Silverado will be slotted above those trims, but below the 2014 GMC Sierra Denali, the top-of-the-line offering from Chevy's sister brand.

Ariel Atom 500 will come to U.S., packs 500-hp V8

This is the car in which strapping yourself in tight is mandatory. British boutique automaker Ariel Motor Co. is on the verge of rolling out the Atom 500, the latest version of its ultralight, two-seat street and track car, this one fitted with a 500-hp narrow-angle V8.