Here is what your employer is worried about: being sued if you get in to an accident while driving the SUV "during the course of your employment."  So they just want to know all they can about the vehicle and the insurance and the owner.  They want to know that there is sufficient coverge on the vehicle in case of an accident but t does not really matter 'cause any good lawyer is going to sue them anyway.  They would be the deep pocket.  I would speak with them again and I would strongly consider not using your personal car to run their errands. Otherwise you very well may have to give them the info. Good luck.