SUV tow ratings, like truck tow ratings, describe how much weight a vehicle is capable of towing. In order to be able to tow loads of any consequence, an SUV needs a heavy duty powertrain and a tow hitch. Heavy duty brakes add to towing safety. According to numerous rating sites, as far as used SUV’s are concerned, the 2004 Toyota Armada and the 2004 Dodge Durango lead the class of towing capable SUV’s. Both come with big and powerful V-8 engines, and heavy duty transmissions with towing/hauling modes. Both are also excellent people haulers, as well.
For more info, see The Best SUV to Buy Based on Safety Ratings and Consumer Satisfaction