How hard is it to change a fuel injector on a 2000 Buick LeSabre with the 3800 motor what all do you need?

To do this job you will need an ordinary flat screwdriver, a needle nose pliers, a 10 mm socket, 6" extension, 1/4" ratchet and nimble fingers. Take off the engine cover, pinch the fuel rail connecting fittings at the base and lift off the two hoses. Do this when your engine is cold and bleed off the pressure in the fuel rail first. Don't damage the fuel rail because a new one will cost over $ 200.00. Loosen and remove the four nuts holding down the fuel rail. Disconnect all six electrical connectors to each injector. Carefully lift up the fuel rail. Pry off the clip holding the top of the injector to the fuel rail. Pull the injector out of the fuel rail and then out of the intake manifold. Install the new injectors and replace top and bottom o-rings. Reassemble and be sure to check for fuel leaks.