No. It's just a question of aerodynamics.
The current combination of vehicle plus the long trailer simply results in the vehicle being affected by the turbulent air created by a semi. All cars are affected to some extent, but as you're in a taller vehicle with a long trailer you're affected even more. Without wishing to criticise your vehicle choice, it's probably worse as it's a US design: although they're often very big and powerful, they do tend to handle like a boat compared to European and Asian models, but on the flipside you simply don't get many non-US models that are that are as big although many produce similar power output using smaller engines which are more modern and efficient.
All you can realistically do to minimise it is to ensure that your tyre pressures are correct and that there is no adverse wear to steering or suspension components. Also check that your towing hitch is at the right height and loading and that there's an effective tow-hitch stabiliser fitted which is appropriate for the size of the load. You'll also find that if you carry loads on the roof of your vehicle it will make matters far worse, so try to avoid doing so.
No.the truck passing you forms a bow wave at the front,which pushes you away,then after the bow wave the is a drop in pressure and that pulls you toward it.if there were a convoy of trucks spaced about 20ft apart,you would have a major problem.thats why truckers tend to keep about 100ft apart.also the trailer has no weight so amplifing the problem.FIT A STABILISER between the rig to help stop the swaying....
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