One problem related to blown head gasket has been reported for the 1998 Cadillac Seville. The most recently reported issues are listed below.
Head gasket is blown. Vehicle milage is only 78, 000. Consumer doesn't understand how a vehicle that doesn't receive a tune-up until 100,000 miles have a head gasket failure at 78,000. Consumer was told that this problem is a common ocurrance and consumer feels that is unacceptable.