NHTSA Complaint #11672975 — 2017 CADILLAC CTS

I began hearing a “hum” when driving my vehicle and dismissed it thinking it was the type of low profile, no flat tires. After a getting new tires, brakes, brake pads, and control arms, we still heard the “hum” and it continued to get louder. We took the car to 4 different places where they all stated the rear differential is the problem. I never had a service engine light come on. We found out that there was a recall on this part for other Cadillac CTS vehicles but my VIN did not come up as one that has a recall. I have had my rear differential fluid serviced and changed right before 30K miles. I now have a little over 95K miles and am told there is a back order for this part due to how many other Cadillac CTS vehicles are having the same issue. This could make car lock up at any time while driving. I transport my grandchildren and elderly Mother in this vehicle regularly. We have been told that it will take over $6K to fix and since the part is on back order, it will be several months before it can be fixed. This is not only a dangerous and possibly deadly circumstance, but extremely inconvenient and expensive. This part needs to be recalled for all Cadillac CTS vehicles and the parts need to be available as soon as possible.