Had to take in our '16 Malibu due to a faulty acce...

Had to take in our '16 Malibu due to a faulty accelerator sensor and was told the part will not be available for 3-4 weeks which is understandable. What is not understandable or acceptable is that the car can shut itself down from 70 mph to 40 mph at any given time. This problem is dangerous and should be rectified immediately. Our family could not take our "newer" car on a recent vacation due to this serious issue- very disappointed to say the least.