There's lots of places online you'll get useless guesses at what's wrong... However some hands-on diagnosis and testing by a 'mechanic' wil prove what's wrong!! .. Be sure to add a little more detail wherever you go!
RepairPal Certified shops can diagnose and repair your 1998 Buick Park Avenue. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.