TrailerLife.com, CampingLife.com and OnlineTowingGuide.com provide guides for towing capacity. The year, make and model of the tow vehicle are needed in order to determine the towing weight limits.
TrailerLife.com provides towing guides in PDF format that include setup tips, equipment suggestions and a full list of the model years towing-enabled vehicles. The site also provides a searchable database of tow ratings.
Camping Life Magazines website, CampingLife.com, has a searchable database that includes trailer weight as an optional search criterion in addition to year, make and model. The site also includes reviews of tow vehicles and trailers.
In addition to an online searchable database, OnlineTowingGuide.com offers the downloadable Towing Capacities App that allows users to search for specific towing limits for every SUV and pickup truck sold in the United States between 2004 and 2013.