There are 3 owner-reported powertrain & transmission complaints for the 2015 Cadillac ATSin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
My rear differential completely stopped on the freeway, not moving and saying over 100 mph and my car was barely rolling I am extremely lucky that I did not get rear ended because I was very close to that happening, a few cars had swerved to not crash. Luckily I was able to push my car to the exit and get off of the freeway to wait for the flatbed to pick me up. It is available to be inspected it’s just parked until I can get it fixed, the part is $1800 and I have not been able to afford it. I had a mechanic come and look at it and I was told what part it is. There was absolutely no warning lights for this issue.
I NOTICED A ROARING NOISE WHILE DRIVING THE VEHICLE SEVERAL MONTHS BEFORE TAKING IT IN TO THE DEALER I WENT TO BARKLEY CADILLAC GMC IN TUSCALOOSA ALABAMA AND WAS TOLD THAT THE REAR END HAD A PROBLEM AND NEEDED TO BE REPLACED.
REAR END IS MAKING HOWLING SOUND. THE SOUND STARTED IN LATE DECEMBER OF 2019. SINCE THEN I HAVE ONLY DROVE THE CAR TO THE REPAIR FACILITY THIS WEEK. CERTIFIED REPAIR FACILITY IS STATING MY DIFFERENTIAL IS NEEDED TO BE REPLACED. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026