[JonV]

If it's an early build 04 it could be the fuel sender issue, although most of us have had it drop and read empty after we've filled it. Not stay Full.

 

[JonV]

Originally the fix was replacement of the complete assembly, at a later date it was said only the "sender" or "Sensor" was replaced. Not the whole assembly which consists of pump/filter/sender(sensor). Many threads on this in the early SS days (03-4). Now it's out of it's infancy and just out of the toddler years...

 

[JonV]

Good query but I don't have a clue, my Dealer did it, about a two hour job as I recall....I think there might be a DIY. Stay tuned, one of the more mechanical types that's actually done it will have an answer.