One problem related to engine shut off without warning has been reported for the 1998 Buick Park Avenue. The most recently reported issues are listed below.
When going downhill the consumer places the vehicle in first gear and the engine dies the mechanic believes that shifting down effects the engine's computer so that it shuts down but the consumer is conserned about what's in the owners manual which states if you dont downshift the brakes could get hot and cause poor or no braking ability. Nlm.