I think its probably OK. I was just pointing out some of the inconsistencies in the classification of vehicles from my point of view.

I guess the US is different regarding trucks, I guess the main difference is that trucks (including pickups and many SUVs built on truck frames are classed as trucks and do not have to meet all the safety standards that are mandated for cars.

If I had to separate them your explanation may be best e.g. commericial and non-commericial trucks.