Before you get excited that the Pontiac G8 is making a comeback, stop, settle down, and accept that this is just a test mule. Chris Doane caught Chevy driving the new SS platform, which will be based on the Holden Commodore and Vauxhall VXR. Note the huge rear tires that are different from those up front. All three of these cars will begin hitting the production line in late 2013. 

[via Autoblog]