117 problems have been reported for the 2008 Cadillac DTS. The following chart shows the 17 most common problems for 2008 Cadillac DTS. The number one most common problem is related to the vehicle's electrical system with 37 problems. The second most common problem is related to the vehicle's engine and engine cooling (14 problems).
In our research we use the PPMY index to compare the reliability of vehicles. The PPMY index of a certain model is defined as the problems reported per thousand vehicles per Year. The total sales of the 2008 Cadillac DTS in the United States are 42,480 units [1]. If the total number of problems reported by Cadillac DTS owners in the last 16 years is 117, and the age of the vehicle is 16, the PPMY index can then be calculated as
PPMY Index = 117 / 42,480 / 16 * 1000 = 0.17.
For more information, refer to this page: A study of reliability comparison across Cadillac DTS model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2008 Cadillac DTS in 2008.
| Service Year | Number of Problems |
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| 2008 |
When making the decision between buying a new or used Cadillac DTS, the following table can be used to compare the 2008 Cadillac DTS with the Cadillac DTS from other model years. Note that the number of problems reported for the 2008 DTS is 117 while the average number of problems reported for the 8 model years of the Cadillac DTS is 84.