AutoCar-Live

People who follow the Volt development closely know that GM has about 35 mules clad in Chevy Cruze bodies.  These have been undergoing extensive continuous daily testing for months.  By the summer we will see the arrival of the first full Volt interior and exterior prototypes, and likely begin to see public test drives.

http://gm-volt.com/2009/03/16/gm-aims-to-wow-customers-with-seemless-and-intuitive-chevy-volt-driving-experience/