2005 Buick Century Fuel Level Sensor

You need to drain the fuel tank and remove the fuel filler cap and the fuel filler pipe screws from the fuel filler pocket, loosen the Fuel Filler Hose clamp at the fuel filler pipe and remove the fuel filler pipe screw from the underbody and the fuel filler pipe.

You need to install the Fuel Injector upper O-ring, the fuel injector lower O-ring, the fuel injector to fuel rail, the fuel injector retaining clip, and the fuel rail.

You need to disconnect the negative battery cable, relieve the fuel system pressure, remove the upper intake manifold, the fuel pipe retainer clip bolt, the engine fuel feed pipe from the fuel rail, the engine fuel return pipe from the Fuel Pressure Regulator, and the fuel feed and the fuel return pipe O-rings, discard the O-rings, disconnect the main fuel injector wiring harness connector, pull up the lock release on the fuel injector electrical connectors, depress the lock tabs and disconnect the fuel injector electrical connectors, remove the fuel injector wiring harness from the fuel rail, disconnect the engine coolant temperature (ECT) sensor electrical connector and remove the fuel rail bolts, the fuel rail assembly and the fuel injector O-ring seal from the spray tip end of each injector, and then discard the O-ring seals if damaged.