I'm still working to find more official pages that show specs for towing. You would think it wouldn't be this tough. If you find places that show payload & towing, let me know. I'm really hoping to just list a few places with official links rather than piece together every year for every model from all kinds of places online.

• Ford Towing Guides: http://www.fleet.ford.com/towing-guides/
• Dodge Towing Guides (2002-2009): http://www.dodge.com/towing/D/vehicle_to_weight.js...
• Dodge 2010 - 2014 Guides: Search for "[model year] dodge [model] payload pdf" in Google. An example would be "2010 dodge 2500 payload pdf"
• Dodge Towing Guides (2015-2016): http://www.ramtrucks.com/en/towing_guide/

RV Weight Notes: https://workflowy.com/s/DazD.v593EmYK93