Learn to program the remote to your Cadillac DTS DeVille. The process is the same for 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 and 2010 Deville models.
The Cadillac DTS/Deville Touring Sedan officially became the DTS in 2006. It was previously known simply as the Cadillac Deville. The Deville has been made by Cadillac since the 1990 model year. The overall design of the DTS is very similar to the Deville.
All Deville and DTS models have keyless entry. Your DTS or Deville should come with a remote, as the feature comes standard on the Cadillac.