I went down and weighed my K5 to see how much tongue weight I can take. The GVWR of the blazer is 6,100 and the truck weighs ... 5,900!!! /forums/images/graemlins/eek.gif It is almost stock, 32" tires, stock drivetrain. In the back, I have a winch (120#), chains and rigging (60#), tools (60#), tire chains (22#), misc. (40#), Me (240#). So I guess I can get down to 5,600# without too much trouble. It seems strange that the vehicle weighs so close to the max GVWR though.