BTW, I feel your pain on the 32 gallon tank, dealer pulled some jedi mind tricks and I went for it
I love having it! I like having a little bit of extra range. It's not like having it is costing more money - the gas costs the same regardless, all that changes is the fill-up intervals. The effect of an extra 6 gallons of gas on your mileage (in terms of weight) is basically non-existent. Unfortunately, at $100.00 or so per tank, the gas every month is as much as the truck payment.
Best I can remember seeing is a little under 500 miles DTE. Not so much lately because a lot of the pumps around here cut you off at $100 and with the price of gas continuing to go up, that no longer fills the tank, so my DTE estimates after fill-up have gone down. Think the last time around it read 437. Used to be more like 473 (or more).