I have a 2014 Impala LTZ (108,XXX miles) that had the same issue! The only issue I had AT THIS POINT was that the side detection wasn't actually working and i was getting 3 warnings when the car was started (blind detection failure, camera failure and one other one) but the car ran fine. I called the dealership with the issue and they ran my VIN and found that my car was covered for free replacement parts and labor. I waited 6 weeks for parts to arrive and then took car in to have the issue fixed. Got the car back and it ran fine with no warnings at start up and the side detection was working great...

I drove the car for about 10 days and then had major issues. I was driving down the highway and all of a sudden my gauges stopped working, my heat shut off and I was getting tons of warnings (tire monitor system, front camera, theft deterrent system, side detection failure, airbags failure, cruise, Stabilitrac, etc.) I called the dealership to let them know the problem and they said they will reorder more parts and maybe the replacements were "defective"... I'm guessing the dealership probably just disconnected it, cleaned the corrosion and put it back together and called it good. Who actually knows...

I am demanding 2 new sensors and the wiring harness!!!! In the meantime I pulled #62 fuse and will just deal with the 3 warnings at start up until it's fixed correctly...