The fuel pump may fail causing the engine to stall and not restart.Google+
Car Problem Reports
Cadillac DTS Replace Fuel Filter Every 30,000 to Prevent Fuel Pump Failure
Cadillac DTS Problem
Average Mileage: 75,320 mi (11,100 mi - 110,000 mi)
Visitor, 2008 Cadillac DTS, 96,677 mi
The engine failed to start although the starter was spinning.
AAA diagnosed it as a possible fuel delivery issue, and took it to a repair service. The diagnosis was proven correct. It also caused the rear fuse block located adjacent to the pump to burn out.
Visitor, 2008 Cadillac DTS, 63,000 mi
The car would not start. Took it into the dealership and they told me that it was the fuel pump. They specifically said that it overheated and also damaged the relay.
Visitor, 2008 Cadillac DTS, 110,000 mi
Starter tries to start but will not fire car. This occured without any previous signs of a problem.
Visitor, 2006 Cadillac DTS, 11,100 mi
Won't turn over
Visitor, 2009 Cadillac DTS, 74,500 mi
FAIL TO START