The contact owns a 2019 Cadillac XT5. The contact stated that while his wife was driving approximately 20 MPH, the brake warning light illuminated. A message "Steering Power Reduced" was displayed before the steering wheel became difficult to turn in either direction. The contact stated that one day prior to the failure, the low power steering fluid warning light was illuminated, and the brake fluid was refilled. The contact stated after picking their children from school, the failure occurred. The contact who is an independent mechanic, was able to replicate the failure. The vehicle was taken to the local Auto Zone where the brake fluid was refilled only days after the brake fluid had been refilled. The vehicle was towed to a local dealer to be diagnosed; however, the failure could not be duplicated. The vehicle remained at the dealer for further investigation. The manufacturer was not made aware of the failure. The failure mileage was approximately 27,300.

- Urbana, IL, USA

Georgia

- Kennesaw, GA, USA

Message Displayed on 2019 Cadillac XT-5 "Steering Assist is Reduced - Drive With Care". No check engine light, and no apparent loss of steering. Noted that Temperature Gauge and Air Conditioning ceased to work. Suspiciously, a 2017 Cadillac XT-5 that I also own, the identical displayed message came on, with identical same mechanical issue, and just learned that an acquaintance with a newer Chevy Blazer just experienced the identical issue also. All vehicles are equipped with OnStar. Coincidence, OR any possibility that GM or OnStar computers have been hacked into, as OnStar has ability to control various functions of vehicles. To correct the issue (possibly only temporary) was to remove the negative battery cable for a short time, and reattach.

- Delray Beach, FL, USA

While traveling home to Louisiana from a vacation, I noticed the engine temperature what stuck on Cold. We also were experiencing loss of power steering, and loss of AC in the car. We stopped at AutoZone in Destin, FL where they completed their FixFinder which reported the thermostat needed to be replaced, being it was stuck in the open position and wasn't properly gauging the engine temperature. Some of the engine fluids were extremely low due to overcompensation because of the thermometer issue. Seeing as we were traveling and not near our local mechanic or dealership, we called around to various auto shops to see who could fit us in same day. The only available shop, without having to spend an additional night in FL, was Pep Boys in Fort Walton, FL. They also let us know they did not have the thermostat compatible with my engine in stock, so that would need to be purchased at AutoZone if we wanted the car fixed same day; which is what I did. While we were at Pep Boys, there was another Cadillac xt5 there for repairs to their AC. It turned out, they were having the exact same issue I was having, but it hadn't escalated to the power steering yet. The mechanic googled the two issues and found there are known issues with the engine thermostat in this make/model, but there has never been a recall issued for it. Now Cadillac is refusing to reimburse me for the repairs because I was still within my Powertrain warranty (under 73k miles) but because we were in a hurry to get home from vacation to get back to work, we did not take the car to a GMC dealership, so the Powertrain warranty is apparently useless here. My extended warranty is also useless because the Powertrain warranty is still in effect.

- Mandeville, LA, USA

My vehicle is receiving a notice "Steer Assist is Reduced Drive with Care". Per discussion with the dealership this is a result of a thermostat issue causing an issue with the grease temperature in the steering. Based on a bulletin to the dealerships from 2017 this is a known issue and continues to be a known issue for multiple GM vehicles. GM can not supply new thermostats to dealerships and they are just resetting the warning. Steering is a critical issue and GM is aware of an issue and is not recalling or repairing timely.

- Roseville, MI, USA