2020 Cadillac XT6 Powertrain (other) Problems

at 60,740 miles, "Steering Assist is Reduced Drive with Care" message appeared. Under warranty, but dealership booked for 2 months. Error went away. After powertrain warranty expires (70,000 miles), message constantly appears, and coolant thermostat display is BLANK. Results in excess fan usage (lowering fuel consumption), reduced steering assist, aggravation, check engine light. This issue has developed while under warranty, for a practically new car. Unacceptable. An extended warranty should be in effect for model 2020 as well.

NHTSA ID

11733526

Incident

Jan 29, 2026

Transmission jerking and has become unsafe to drive. Will have to go back to the dealership for this issue. This will be the third time 4 same issue.

NHTSA ID

11717683

Incident

Sep 1, 2025

Vehicle has a high-pitched whining noise when cold. Vehicle also has a transmission shutter problem at lower RPM. I do not think the two are related rather than two separate incidences. But cannot be confirmed that they are two separate. Maybe one problem only. I do have video of this happening. Cannot upload a video though.

NHTSA ID

11648582

Incident

Dec 7, 2023

Transmission shudder at low RPMs. Feels like transmission should down shift sooner, but it shudders and shakes until RPMs get up higher. Does it when RPMs are around the 1500 mark. Vehicle almost seems like it will stall unless you give it more fuel to get RPMs up higher.

NHTSA ID

11648581

Incident

Mar 31, 2023

The contact owns a 2020 Cadillac XT6. The contact stated while driving at 35 MPH, the vehicle lost power. The vehicle was restarted from the Cadillac App via phone. The contact stated that during the second failure " The steering assist is reduced drive with care" warning message and the check engine warning light illuminated. The contact stated she called On-Star where she was informed the tire pressure, the engine, and the transmission needed attention. The vehicle was towed to a dealer by AAA where it was diagnosed the camshaft solenoid was faulty, with a present poil leak, along with codes P0014 and P0017. As a result, the parts of the engine and battery needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and offered the contact a check to purchase a new vehicle. The approximate failure mileage was 159,838.

NHTSA ID

11632207

Incident

Oct 15, 2024

Mileage

159,838 mi

There is a known problem, which Cadillac refuses to recall, regarding a steering assist reduced warning. The warning light disables the air conditioning system and steering assist. When the light comes on, reduced power to the steering system occurs. I took the vehicle in to be serviced, but the service light was off, and Cadillac refused to fix it; intentionally trying to run the timer out on the 5year/70,000 powertrain warranty. It's a known issue, all over the internet. In fact, they recalled several models due to the same problem. "19V-086 / N182182760 Recall Summary If the steering assistance is not available, extra effort would be required to steer the vehicle, and this would increase risk of a crash. General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CTS, and 2017 Cadillac ATS, Chevrolet Camaro, and Chevrolet Corvette vehicles." I've reset the light several times, and it usually stays off for several days before returning. This sounds like a software problem, but Cadillac has not taken any steps to fix the issue. It is dangerous for any reduction in steering, especially during winter or at highway speed. It's also dangerous to disable air conditioning, as during the summer, the temperature can reach above 140 F inside a vehicle. If a driver were to have a medical event in a parking lot, or fall asleep with the vehicle on while simply waiting for somebody -- while assuming the air conditioner would keep them cool and comfortable -- within 10 minutes the temperature could reach 130+ degrees, and into the 150s in California or Las Vegas. Software should never reduce steering assist, or disable the air conditioner automatically. I would like a recall to be issued regarding this problem. I don't know if they have designed the system to fail right at the warranty or just after, but it certainly appears that way. Please look into the matter. Cadillac has refused to repair under warranty. [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.

NHTSA ID

11626377

Incident

Jul 15, 2024

I was waiting for a light to change to green and the vehicle shut down because of the auto-stop feature, after a couple of seconds the car turned on again and this message came on "stability track off" and this happened like that like 3 times until I turned off the auto-stop. I took it to the dealer the next day and they scanned it for issue and told me there's nothing wrong with the vehicle.

NHTSA ID

11578590

Incident

Mar 13, 2024

Intermittent shifting problems. Is stuttering when shifting. There seems to be an ongoing problem according to online and G M itself why isn't this recalled. There is no starting point it is intermittent on going. At the 1st instance they recorded it but it didn't get fixed and now they want to see it happening again but it's intermittent how many times do I have to go back

NHTSA ID

11503842

Incident

Jan 26, 2023