GVWR's

Trailer Life has some great Towing Guides.

Towing Guide

Better check GCWR while you are looking...that is usually the limiting number

WOW.... your facing a big challenge for finding all of our trucks GVWR. Can you narrow it down a bit to a LDT or MDT or HDT lines and what year models.

You can start with these sites from Ford/GM and Dodge/Ram.

Ford

GM

http://www.rambodybuilder.com/year.pdf

Its all in these factory websites.
The one from GM has a weights calculator that figures a trucks front and rear axle weights for all standards and options.

http://prodcontent.s3.amazonaws.com/trailerlife.com/digital_editions/TrailerLifeTowGuide2014.pdf

google

At each MFG. website.