My 2024 gets much better mileage than my retired 2012 Traverse.
With super cruise I was able to go about 5.5 hours / 350 miles and still had over a quarter tank closer to 1/3rd.
In the 2012 I could go like 6-6.5 hours max to empty. I'd guess to say I could get 7.5+ hours from full to empty. I think it's the same size tank. And I haven't tracked actual mileage just going off opinion after one long road trip.