Yes the 5er is too heavy for your truck, but ask yourself where you plan on going and how many times a year your travels take you on camping trips of 200 miles or more. If your doing Cross Country trips or going into the Rockies, even into the mountains of VT,NH this will be hard on the truck and driver too. When your over your max weight besides the legal stuff there is the Brakes, which take longer to stop VS a 10K load.. Then pulling a 7% mountain pass thats 2miles long But heres the kicker it sets at 7,000 to 8,000 feet, wow the EGT runs very high and you see the Black smoke coming out the tail pipe and you need to drop down into the lower gears and hang out in the slow lane with the 18Wheeler..Why turbo can only pull in so much air, at that altitude the air is thinner. Theses are some issues I find, but brakes scare me, for when that car pulls out in front of you or the traffic light at the bottom of the hill turns Red....Next time out after driving for like a hour try the panic stop, the real hard stop..well did you run them over? See you can build up our trucks but its the unseen things we don't think of until it happens....So if you ride local and take a easy but be careful..So go to the scales on your next trip ALL loaded and see what you have and where your heavy-axle weight also means tire limit too.Pin weight runs around 20-25% of the 5er gross so a 17k gross is about 4,250lb pin weight plus whats in you bed of the truck( hitch,Gen,firewood,extra fuel,stuff) adds up fast now a pin of 4,600#..
