One problem related to engine head gasket failure has been reported for the 1997 Buick Lesabre. The most recently reported issues are listed below.
While entering the interstate highway, car started losing power at 50mph. After getting car up to a safe speed, got the car home where it then stopped running and would not re-start. Mechanic checked and found that the head gasket failed at 130,000 miles. This car has always been well maintained. Nearly caused me to be rear-ended as I was on a70mph interstate highway! also, your website keeps telling me I have an "invalid VIN number!" this is the only one ever issued for this vehicle. What's with this?.