I know the electric jacks will lift the wheels off the ground. I have done it a few times, but not to change a tire. The auto level lifted one side off the ground when I was trying to get level on a very un level camp side. I had to use several blocks on one side, but end result was both tires on one side came completely off the ground. I could tell it put a strain on the system. I would make the same recommendations as others and use a bottle jack and jack stands. Do NOT put the jack on the axle. Use the frame rail if you can, or the plate under the springs at the axle. Put the jack stands in the same spots, NEVER the axle alone. You will likely bend your axle if you do that.