Chevrolet's Impala is going rear-wheel drive in 2009, Automotive News reports. General Motors sources say the next Impala will share a RWD platform with the upcoming Chevrolet Camaro, which will be built late in 2008 in Oshawa, Ontario. Impala production will start several months later, a GM source said. GM has yet to decide whether to maintain the Impala as a mass-market sedan or move it upmarket. An upscale Impala would enable GM to avoid a market overlap with the restyled and re-engineered 2008 Chevrolet Malibu, which will debut at the Detroit auto show in January, according to Automotive News. However, the GM source said that any guesses on whether or not the Impala will go upscale would be speculative at this point.