It couldn't hurt. Anything you can use to prevent the car from rolling if it slips out of gear could save your life. Whichever end of the car I raise, I chock both wheels, (on both sides of the wheel/tire), on the other end of the car. I always use at least two jackstands to hold the car in the air, if not another, as well. When your car is jacked up into the air, that's an awful lot of weight being suspended over you. Be as safe as you can be. :thumbsup::yes: