The armored 2009 Cadillac Presidential Limousine will make its debut at Obama's Jan. 20 inauguration in Washington.
The Detroit News reported that the vehicle includes heavy armor that is reportedly at least 5 inches thick, run-flat tires, bulletproof glass and a completely sealed interior to ward off a chemical attack. It also has electronic communications equipment, the paper reported.
The Secret Service and GM say they'll reveal more about the custom vehicle's specifications next week.
Older-model presidential limos will remain in use. The previous model, a modified Cadillac DTS, was introduced at President George W. Bush's second inauguration in 2005.