When large, truck-based SUVs collide with passenger cars or minivans, the results can be devastating for the occupants of the latter. But fatalities in such .\rbr\rbrWhen large, truck-based SUVs collide with passenger cars or minivans, the results can be devastating for the occupants of the latter. But fatalities in such.\rbr\rbrResults from IIHSs latest testing showing that vehicle height can make a huge difference in a collision with a smaller car.