OEM 2008 Cadillac STS Fuel Tank

2008 Cadillac STS Fuel Tank Parts and Q&A

• Q: How to replace the primary fuel tank module on 2008 Cadillac STS?

  A: The initial step to replace the primary fuel tank module requires removal of the fuel tank to gain access to the module. Remove the fuel feed hose quick connect fitting from the primary fuel tank module after which remove the fuel feed hose from the fuel tank retainer before placing it aside. Disconnect the electrical connector from the primary fuel tank module by releasing the interlock and then free the wire harness from the retainer on the fuel tank module while setting it aside. Applying J 45747 along with a long breaker-bar allows users to unlock the fuel tank module lock ring through counterclockwise rotation before removing the cam lock ring. To access the fuel transfer hose quick connect fitting you must remove part of the primary fuel tank module before disconnecting it and removing the module from the fuel tank but discard the module seal. Check the lock ring for damages while also examining its warpage level; replace the lock ring if the warpage exceeds 0.41 mm (0.016 in). Repeat this process to install the new fuel tank module seal by holding onto the fuel transfer hose inside the tank and fastening the primary fuel tank module partially. You should attach the fuel transfer hose quick connect fitting to the port at the fuel tank module while pressing down the module until alignment with the encapsulated ring. Then confirm the lock ring faces upward before installation. The installation of the fuel tank module lock ring requires J 45747 and a long breaker-bar for clockwise rotation until complete lock-up. Reestablish the electrical connector on the primary fuel tank module then feed the wire harness to its tank retainer before joining the fuel feed hose quick connect fitting and placing the hose on its tank retainer. Return the fuel tank to its original position for final completion.