So... where did they hide the fuel filter on the '06 Sequoias?

I have the part, threaded hard-line fitting on one end, hose barb on the other. It looks like something that would typically be along hte frame rail, but I've followed the lines all along the driver's side frame rail back to the tank, and don't see it.

The lines seem to route up under the tank.. .and then perhaps also under the spare tire? The owners manual doesn't seem to show it, and this far I haven't found a good service manual for these rigs online.

Any clues as to where it may be?

Thanks.

-Steve