Two problems related to car stall have been reported for the 2000 Cadillac Seville. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Cadillac Seville based on all problems reported for the 2000 Seville.
The vehicle stalled intermittently while driving. The vehicle was taken to the dealer and the dealer found that the crank shaft sensor needed to replaced. This also occured in 2002 at the same time the sensors were replaced.
On two separate occasions my old 2000 gm Cadillac sts stalled while driving on the highway. This was not a mechanical problem - it was some sort of defect. Note that it was "repaired" in between the incidents, do it was not the same initial problem. I filed a complaint back then, but got no response. The mechanics at the palo alto Cadillac dealer seemed to know of the problem. At the time, they said it was a failure of some sensors on the flywheel. I don't know if this was related to the current ignition switch problem. Having a vehicle stall at 65 mile per hour is absolutely terrifying. You lose power steering and brakes. It would have certainly ended up in an accident if I didn't understand how cars work. I was able to shift into neutral and restart the car. My point is, there was a defect on this car that appeared to be known by gm, and was also ignored. The complaint was ignored by the NHTSA. I think you should also inquire with gm what was known about this defect. As I wrote - they seemed to have known that this was a problem, and just repaired it, rather than understand the risk they were making us take. I ended up selling the car because of this issue.