General Motors Corp. recently delivered to the U.S. Secret Service a brand new presidential limousine, replacing the 2006 model Cadillac DTS presidential limousine that President George W. Bush has used.

The new limousine, dubbed the 2009 Cadillac Presidential Limousine, makes its debut on Inauguration Day. It’s the first presidential limousine not to carry a specific model name, said GM spokesman David Caldwell.

The armored 2009 Cadillac Presidential Limousine will make its debut at Obama’s Jan. 20 inauguration in Washington.

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.