The fuel filter on a 1999 Buick Century is located
on the frame rail, near the fuel tank, usually on the passenger side. However, it's *not* easily accessible and often requires dropping the fuel tank or at least significantly maneuvering underneath the vehicle to reach it. This is a job best left to someone experienced with automotive repair or a professional mechanic.
Because its location can vary slightly depending on engine and trim level, it's highly recommended you consult a repair manual specific to your 1999 Buick Century. A Chilton's or Haynes manual will show you exactly where it is and how to access it.
