I'm looking for a truck to haul my 25' Airstream (GVWR 7100 lbs) and am looking at the 1500 (as opposed to the 2500) as a compromise between towing capacity and daily drivability. I've read the towing spec charts and it seems like the 1500, if optioned correctly, can tow 10,500 lbs and more. My question is how can I identify (online) those vehicles that are optioned so as to be able to tow to my requirements? Am I looking for the "Tow and/or Trailer package"? or the 3.92 gears? Only some of the sites like cars.com or trucar provide filters to identify specific packages like this. I've also used the VIN lookup tools to identify the 3.92 gearing and other equipment specs. Any help would be appreciated.