I have a Chevy 2500 Duramax that I towed a 17,000 pound fifth-wheel all over creation and back. I've burned through some tires. Best I have found for towing in my situation are the Micheline LT2 in load range E. I get them at Costco and they usually have some sort of discount when buying four tires together.
Va Beach, VA
2009 Jayco Seneca HD 36MS