Here is where I saw it at: http://www.jayski.com/teams/chevy.htm
Chevy to replace Impala in 2013 with another Chevy brand: Chevrolet is developing a new car with a new name for its 2013 NASCAR entry, replacing the Impala used by Team Chevy, and plans to eventually market and sell the new model to consumers. The dealership and racing versions of the car will be unveiled this year, after the New York auto show in April, spokesman Monte Doran said. The new car will use a nameplate not currently in Chevy’s lineup. Neither the car nor its name will be a derivative of an existing one, such as the new Malibu or the upcoming redesigned Impala, Doran said. General Motors wouldn’t reveal details. “We are keeping the wraps on the new car for now and will continue to prepare for next season by testing camouflaged vehicles,” Jim Campbell, vice president of Chevrolet performance vehicles and motorsports, said in a statement. “We know that Chevrolet fans are eager to see the new race car, and we hope that the prospect of being able to own one just like it will make the wait a little more bearable.”
The new car may be a version of the Chevy Caprice currently imported from Australia for U.S. police forces. Inside GM, a plan to develop a Chevy performance sedan like the Caprice for consumers was on-and-off in recent years because of concerns that it wasn’t a high-profit vehicle, people familiar with the situation said. Australia’s Holden brand currently offers consumers a variation on the U.S. Caprice. Along with developing the new performance sedan, GM is redesigning the current Impala, which will be built at the Detroit-Hamtramck plant and is expected to hit showrooms by spring 2013. The automaker is also rolling out a redesigned Malibu.(Detroit Free Press, more at MotorTrend and a past post at AutoWeek)(3-13-2013)
I did read it somewhat wrong though. It just says after the auto show, not at the auto show...