OEM 2009 Cadillac STS Fuel Tank

2009 Cadillac STS Fuel Tank Parts and Q&A

• Q: How to replace the primary fuel tank module on 2009 Cadillac STS?

  A: Begin the replacement of primary fuel tank module by removing the fuel tank which exposes the module. The procedure starts with disconnecting the fuel feed hose quick connect fitting from the primary fuel tank module then removing the fuel feed hose from its retainer on the fuel tank before setting it aside. You should unfasten the interlock before pulling out the electrical connector from the module while moving the wire harness from the fuel tank retainer. The fuel tank module lock ring can be unlocked counterclockwise with the J 45722 breaker-bar before removing the lock ring. The goal is to expose the fuel transfer hose's quick connect fitting through removal of part of the primary fuel tank module. Take out the primary fuel tank module from the fuel tank before discarding the fuel tank module seal. A new fuel tank module lock ring requires replacement when warpage exceeds 0.41 mm (0.016 in) yet the damaged lock ring with less than 0.41 mm (0.016 in) warpage can be reused. It is essential to install the new fuel tank module with both a fresh fuel tank module seal and the correct orientation of the lock ring with its upward side. You should partially attach the primary fuel tank module before you connect the fuel transfer hose quick connect fitting to its port. First depress the module downward before aligning it with the encapsulated ring then place the cam lock ring toward the fuel tank. Install the lock ring by turning it clockwise with the use of both a J 45722 and long breaker-bar until it reaches full seating. Connect the electrical connector to the primary fuel tank module and fix the wire harness to its retainer followed by fitting the fuel feed hose quick connect fitting to the module. Install the fuel feed hose to the retainer found on the fuel tank before reinstalling the tank.