Purchase a fuel line disconnect tool from the parts store, there are several types so get the right one. The fittings are spring loaded and need to be pushed in with the tool then pulled apart.
It may be different but for the Saturn it only need a plier. It have a clip. The 97 Ford Ranger takes a quick disconnect tool to remove the front fuel hose from the filter. Since you didn't ask for a specific model, it's hard to tell.
It does no harm to disconnect the battery when working on a vehicle but in general no, you do not need to disconnect them to change a filter.
To remove the fuel filter on a 2002 Saturn Vue, first ensure the vehicle is off and relieve the fuel system pressure by removing the fuel filler cap. Next, locate the fuel filter, which is typically found along the fuel line under the vehicle. Disconnect the fuel lines from the filter using appropriate tools, and then remove the mounting bolts or clips securing the filter in place. Finally, replace the old filter with a new one, ensuring that the flow direction matches the markings on the filter.
The fuel filter is on the drivers side frame under the brake master cylinder. To change it remove the 2 10mm nuts from the filter bracket then disconnect the fuel lines to it AND CAREFULLY REMOVE do not bend the plastic lines.
The fuel pump is located inside the fuel tank. removal of the fuel tank is necessary to service the fuel pump. the fuel filter is located just behind the engine on the firewall. removal is tricky and will require a quick disconnect tool.
it is near the fuel tank... and by the way, relacement filter are avaiable at Saturn only.
filter is on the right side beside the fuel tank
The fuel pump for the 2001 Saturn SC1 is in the gas tank
locate fuel pump wiring in 2003 Saturn L200
trace fuel lines to filter, disconnect lines from filter, fit lines to new filter
In the fuel filter.
The fuel filter is behind the right rear tire. To access you need to remove the right rear back tire. If you plan to change the fuel filter it is a good idea to disconnect the fuel filter relay and start motor until it stalls. Also, disconnect battery prior to fuel filter removal.