We've updated our reliability stats for the CTS to include owner experiences through the end of 2015, about eight months ahead of other sources.

In terms of repair trips per 100 cars per year--lower is better:

2014 CTS: 63, high, small sample size
2012 CTS: 22, low, small sample size
2011 CTS: 44, moderate, very small sample size
2010 CTS: 36, low, very small sample size
2009 CTS: 86, high, small sample size
2008 CTS: 67, moderate, small sample size
2007 CTS: 55, low, very small sample size
2005 CTS: 129, high, small sample size
2004 CTS: 104, moderate, very small sample size

In some of these cases, only another response or two would eliminate the "small sample size" note. Additional participants would be very helpful for all.

For the repairs behind these stats, reliability information on other models, and to sign up to help improve this information:

Cadillac CTS reliability ratings and comparisons