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McLaren 12C Can-Am at Pebble Beach

A (currently) one-off McLaren MP4-12C – the McLaren 12C Can-Am – is heading for Pebble Beach, previewing a track-day MP4-12C. The McLaren MP4-12C is a one-off track-focused MP4-12C, developed by the same McLaren GT team which developed the MP4-12C GT3 race car, and its heading for Pebble Beach this month to tempt US track-day enthusiasts. Developed without the constraints of a racing series, the 12C Can-Am is based on the GT3 car and adds a new aerodynamic package – which improves downforce by 30 per cent – with a carbon fibre splitter with little winglets atop, a huge rear tray of a spoiler and a carbon fibre diffuser.

GMC extends Denali trim to 2011 Sierra 3500

More Denali. That's what GMC says heavy-duty truckers want, and that's what the truck maker aims to give them. GMC announced on Friday that the Denali trim will be added to the 2011 Sierra 3500 model in several configurations.

Alfa Romeo 4C spied in Michigan

During the Detroit auto show in January, Fiat and Chrysler CEO Sergio Marchionne told us -- in his own irreverent way -- that arrival of the long-promised Alfa Romeo 4C would be delayed once again. But as these spy photos show, testing on the sporty coupe continues even as a debut date remains elusive. This isn't the first time we've caught the 4C testing in the States.