Easy to replace but don't know where its located http://www.familycar.com/store/item/Oldsmobile_Silhouette_Fram_Fuel-Filter_1990_1996_AHG6507.html you should be able to find it follow the fuel line from the tank and its located inline and has a mounting bracket.
Easy to replace, make sure you depressure the fuel system first. Can be done at the fuel rail on top of the engine. Google it. Clean the connections before you disconnect. Haynes manuals are good for helping teach you how to do these kind of things.
The location should be bolted to the frame just under where the driver seat is. At least that's where it is on a '93.