2013 Chevy Express 3500 Passenger Van - Suspension Upgrade

If you do some digging on the tire manufacturer's website you can often find inflation charts for your tires, giving specific cold pressures for specific loads.

Concrete highways can be hard to mitigate because the designers in their infinite wisdom set the spacing between the seams such that it sets up a harmonic with your truck at the posted speed limit. The right wheelbase, and the right speed, and the truck starts galloping. You either have to speed up or slow down.