Is there a TSB for the fuel sender unit issue (fuel gauge reading wrong or taking a while to reflect fuel amount). I've looked, but can't find anything

There is no TSB on this.

For the first 1,000 miles of my Armada's life, the gas gauge was pinned on full and wouldn't move. The dealer wouldn't give me a straight answer on if it was the sender or something in the dash cluster.
Whatever they did, it works great since then. I think I posted all the Nissan part numbers that were replaced somewhere on clubarmada.