The 2011 Chevy Camaro gets a V6 upgraded to 312 HP and no price change on the base V6 and SS models. The 2LT and 2SS models, however, get a $350 increase for the now-standard Heads Up Display. [Camaro5]

General Motors has just announced the X06 Carbon Chevrolet. It features a lightweight body with 7.0 liter engine.

The Z06 Carbon was created to celebrate the 50th anniversary of the first appearance of the Corvette at the 24 Hours of Le Mans when John Fitch and Briggs Cunningham won their class and finished eighth overall. The Carbon edition is essentially a Z06 with a ZR1 chassis and some of the carbon skin. When production starts this fall, only 500 examples will be made and they will only come in two colors, Inferno Orange and Supersonic Blue. All examples get black-painted wheels and a black interior upholstered in leather and suede.

General Motors Co. has been reported to be dropping plans for a Cadillac-badged version of the Chevrolet Volt.

Apparently a Cadillac version of the Volt would be too weighed down by the expected luxury and comfort features to replicate the Volt’s 40-mile electric-only driving range without extensive extra cost, a Bloomberg report said. Sources suggested achieving even a 20-mile driving range solely on battery power might require $30,000 of added cost, the report added.

The loss of the proposed Cadillac variant of the Volt casts more doubt on the near-term applicability of the Volt’s battery-intensive, series-hybrid design.

Some GM executives had argued a Cadillac version of the Volt would help reduce costs – mostly centered around the expensive lithium-ion batteries – and speed wider adoption of the Volt’s technology.