2008 Chevrolet Impala suspension problems

Tl* the contact owns a 2008 chevrolet impala. While driving approximately 35 MPH, a vehicle crashed into the driver side of the contact's vehicle and the air bags failed to deploy. The contact was knocked unconscious and sustained shoulder injuries that required medical attention. A police report was filed. In addition, when making a turn, it felt as if the rear tires lifted off the ground. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure.

2008 chevy impala LTZ -- I am having trouble with the rear inner tires wearing down to the chords just like all the other complaints on here. I know it's not the tire brand, etc. As I've had a reputable mechanic put on two sets of tires. I found articles on a lawsuit and the fact that GM will fix the police cars with this issue, but not the general public's. I bought this car as a commuter car for my sons that will be college students and I need it to last.