You may also find brand specific information on dodge forum.com. You can find the section dedicated to your vehicle and get some information on towing capacity based on your VIN. I did for my Dakota. They "used to" build the towing capacity into the VIN , I believe it is the 4th digit (or letter) in my case. And if you didn't get your truck new it will help with the questions of exactly what the vehicle was actually built with on the assembly line. When I had bought my truck 15 years ago trailering wasn't on my mind. Now it is and I found out that I do have a HD alternator and battery, although I will need to install the extra cooling systems for the tranny, PS and coolant.