How do you dpressurize the fuel line on a 1997 Buick lesabre to change fuel filter?

To depressurize the fuel line on a 1997 Buick LeSabre, first, locate the fuel pump relay in the fuse box and remove it to disable the fuel pump. Then, start the engine and let it run until it stalls, which indicates that the fuel pressure has dropped. Finally, you can safely relieve any remaining pressure by carefully loosening the fuel filler cap. Now, you can proceed with changing the fuel filter.