instead designed from the ground-up by "an R&D arm of General Motors in Detroit" to meet Secret Service specifications. speculation" had President George W. Bush's Cadillac Deville actually based on the chassis of General Motors' line of full-size sport utility vehicles such as the "Chevrolet Suburban, GMC Yukon[,] and Cadillac Escalade." This "Deville" featured armored doors, and "bulletproof glass so thick it blocks out parts of the light spectrum." Rumored components of the car were sealed passenger compartments with their own air supply, run-flat tires, and a engine. Confirmed accessories include "an integrated 10-disc CD changer, a foldaway desktop[,] and reclining rear seats with massaging, adaptive cushions." This presidential state car was estimated to weigh approximately . Bush's presidential state car was nicknamed "The Beast", a name that persisted through the presidency of Donald Trump. When traveling, President Bush took along two of the armored limousines (flown by either C-5 or C-17), one for use and one for backup. This proved fortuitous during a 2007 trip to Rome where one of the presidential state cars stalled for five minutes on a street; the car was re-started, but was replaced with the backup limousine after President Bush reached his destination. Sometimes, President Bush would instead use vehicles already present at his destination such as embassy motor pool cars or military assets, rather than transporting the presidential state car. The president never used non-American-governmental vehicles when overseas. 2009–2018 custom Cadillac The 2009–2018 presidential state car went into service on January 20, 2009 and drove President Obama the down Pennsylvania Avenue from his inauguration to the inaugural parade. A Cadillac, the presidential state car was not based on any single model of car, though it had the "dual-textured grille and the dinner plate-sized Cadillac coat-of-arms badge" emblematic of the Cadillac CTS and the Cadillac Escalade. The headlights and taillights were identical to those used on other Cadillac production models. Anton Goodwin of CNET's Road/Show blog noted that speculation was that the presidential state car was based on the GMC Topkick platform. If that is to be the case, then Goodwin assumed the car would feature either a gasoline-powered V8 General Motors Vortec engine or a diesel-powered Duramax turbo V8 engine. Autoweek magazine asserted that the car ran on a gasoline-fueled engine. This presidential state car was speculated to be much heavier than its predecessor as it is equipped with Goodyear Regional RHS tires