Power Steering Pump problems of the 2008 Chrysler Aspen

After filling the fuel tank, the motor shuts off while driving down the road. It used to only happen when you go past the first "click" of the gas pump. Today it did it by just filling the tank to first shut off. This leaves you with no steering, no brakes and no power while going down the road. This is dangerous on several levels. This happened while the vehicle was moving down a four lane road in moderate traffic with five passengers-two infants, two children and one adult.