One problem related to engine has been reported for the 1997 Buick Riviera. The most recently reported issues are listed below.
As I turned the switch on, the car back fired and then smoke started coming in the car and it was smoking from under the hood. The car was parked in the driveway, I immediately got out. My husband who had heard the back fire from inside the house, opened the hood, and the fire was already blazing. We tried to put the fire out but ended up calling the fire department. The care was completely destroyed.