i read this on wikipedia

The Impala is reported to be getting a heavy redesign for the 2010 model year, with sales expected to begin in spring or summer of 2010. It will be transferred to the rear-wheel drive Zeta platform alongside the new Camaro as well as the Pontiac G8. The 2010 Impala will likely mirror the Pontiac G8's engine and transmission offerings, with V6 and V8 models, and presumably a high performance model to carry the Impala SS name on into the future. The Chevrolet Impala will be constructed at the current Oshawa, Ontario plant that W-Body cars are built in.