With president-elect Barak Obama soon to be sworn in as the nation's leader, a new presidential limousine was in call for and once again General Motors was assigned the task of building it. Nicknamed 'The Beast', the limo is based on a number of GM platforms and shares components with several different vehicles. Its exterior is styled around the Cadillac DTS but underneath the sheet-metal the vehicle is built on a medium-duty truck chassis. The limo has recently been seen testing in prototype form alongside several GMC Topkick pickups, and according to onlookers the wheels and tires on the limo are almost identical to those on the trucks – 19.5in Goodyear Regional RHS tires. The rest of the exterior includes parts from several Cadillac models, such as headlights from an Escalade, and the grille and taillights from an STS.