Problems with anti-theft systems using the raised-chip key can prevent the car from starting. The wires in the steering column to the ignition lock cylinder tend to break. The key and ignition lock cylinder should be replaced to correct this condition.
Car Problem Reports
Cadillac Seville STS Car Won't Start Because of Anti-Theft System That Uses Raised-Chip Key
Cadillac Seville STS Problem
Average Mileage: 135,200 mi (82,000 mi - 174,000 mi)
Visitor, 1996 Cadillac Seville STS, 130,000 mi
Every once in a while, I will go to start the car and it will start and turn right back off, and security light comes on!
Visitor, 1996 Cadillac Seville STS
Visitor, 1998 Cadillac Seville STS
car wont start but the security light keeps lighting up
Visitor, 2000 Cadillac Seville STS, 82,000 mi
Still waiting to get it fixed
Visitor, 1997 Cadillac Seville STS
Anti theft system saying car may not start problem with the theft system
Visitor, 1997 Cadillac Seville STS, 130,000 mi
car wont start anti theft system