TN, If you look on the drivers side door you'll find the build date, and the recommended tire pressure for the ST front & rear which is usually 30lbs & 35lbs respectively. Do a site search on tires on tires. I do not recommend the TOYO Open Country A/T's because of the maximum air pressure being 35 psi giving you no cushion and throwing all the work up into the shocks & springs, etc. Also, do look on Tirerack to get an idea as to what tire for your type driving and driving conditions.
We recently, just before driving to Louisville, put on Bridgestone Dueler H/L Alenza's running 33 psi front & 35 psi rear.