OEM 2010 Buick Lucerne Fuel Tank

2010 Buick Lucerne Fuel Tank Parts Questions & Experts Answers

• Q: How to replace the fuel tank module (NU6) on 2010 Buick Lucerne?

  A: The first procedure when replacing the Fuel Tank module (NU6) is to use correct methods for fuel system pressure relief. Starting with the removal of bolts from the cover and fuel sender access hole on rear compartment liner the technician can remove the cover. The protocol begins by removing the fuel feed rear pipe quick connect fitting and the evaporative emission (EVAP) pipe quick connect fitting from the sender and continues with disconnecting the fuel level sensor wiring harness electrical connectors. Shift both the fuel feed pipe and evap pipe alongside the harness connector into a different position. You should apply the j 45722 (Fuel Sender Lock Ring Wrench) to unlock the fuel sender lock ring by turning it in a counterclockwise direction before taking out the lock ring. The sender needs to be raised slightly for the removal of the fuel sender lock ring after disconnecting the vent line quick connect fitting. The operator should lift the module to expose the vapor line quick connect fittings so they can secure the internal vent lines with a string before the lines drop into the gasoline below. The Fuel Tank opening will become accessible by first disconnecting the vapor line quick connect fittings at positions 1 and 2 which are attached to the module flange. Then rotate the fuel sender toward the rear of the tank to remove it. Pour out the fuel from the sender reservoir bucket into an approved storage vessel then remove both the old o-ring and sender o-ring seal. A lock ring inspection shows whether it can be reused when warpage measures less than 0.41 mm (0.016 in). Otherwise the lock ring should be replaced. To install the fuel pump sender o-ring seal, position a new seal onto the Fuel Tank after you clear the float arm by tilting the sender. Then lower the sender into the tank. Superimpose both internal vent line quick connect fittings (1 and 2) to the sender before removing protective string and applying the sender lock ring. Use the j 45722 to tighten the lock ring clockwise so it becomes locked through the vent line quick connect fitting. Begin by connecting the fuel feed pipe and harness connector and then proceed with connecting the evap line quick connect fitting and the fuel feed rear pipe quick connect fitting to the sender and finally the fuel level sensor wiring harness electrical connector. Follow Battery Cable reconnection guidelines while checking for any leaks during specified on and off of the ignition. Toward the end of installation place the fuel sender access hole cover then bolt it in with 2 nm (18 lb in) torque before reinserting the rear compartment liner along with the intake manifold cover.