Wish I knew too... looking more for Fords but amazed how hard shopping has been
One thing I have noticed, LOOK OUT for Canadian trucks.
Read that it is easier to show a clean Car Fax, the exchange rate makes it better for sellers, more corrosion from salt/chloride, and possible issues with factory warranty claims in US for Canadian born trucks.
I been seeing so many Canadian trucks that I started researching a little and found a lot of stories about these things.