One problem related to power assist brake vacuum has been reported for the 1998 Oldsmobile Achieva. The most recently reported issues are listed below.
Consumer was traveling 10-15mph to a traffic light and vehicle never stopped. Consumer mashed down on brakes twice and there was an air sound. Vehicle was on an incline, picking up speed consumer exited onto highway. Vehicle never stopped until vehicle got to driveway of consumer's home. There were no pedestrians or vehicle. Consumer pused down emergency brake to stop vehicle. Oldsmobile sent a wrecker to pick up vehicle. Oldsmobile agreed to pay for half of cost. Brake booster vaccum was leaking.