Towing Advice

IdaD wrote:
Your tire rating is critical and is on the sidewall. If you're going to push the limit you might look at upgrading to higher rated LT tires and even bags/timbrens. No they don't raise the rv.net rating but in the real world they will help carry the load better.

With the exceptionally low payload that the OP has shared, I'll venture a guess that the truck might already have the weighty OEM air suspension. The LT tires are probably not a bad idea, but the OEM tires do exceed the meager 3900 lb axle rating easily. With a good weight distributing hitch, I wouldn't hesitate going with a 600 lb trailer tongue weight.