As you can see here, Cadillac is still selling quite a few of their cars with the brand up 9.9%. Largely this is due to the ATS which saw a 348% increase that helped offset sales drops for the CTS and Escalade EXT.
In this chart, column 1 is the Sept 2013 sales, col 2 is Sept 2012, 3rd col is the percentage change.
In the latter half of the chart we have Jan-Sept 2013, followed by Jan-Sept 2012, and the percent change.
H/T to GMInsideNews.com