Cadillac CT4 problems and owner complaints

Right rear brake light is out. There is a lot of moisture in the tail light causing the lights to corrode and go out

Owner-reported narrative. Look up ODI 11664086 at NHTSA ↗

The electronic brake control module, break retainer, brake master cylinder and brake valve all failed. I was driving to lunch and coming down a hill when multiple warning lights turned on as I pressed the brakes. I had almost no braking power as I approached a stop sign that lets you enter a highway almost causing me to drive through the stop sign and into cross traffic. I had enough bearings to down shift it and slow it down enough to stop. If I have went through the stop sign, it could have been a fatal accident. The vehicle is at a GM dealer…

Owner-reported narrative. Look up ODI 11745985 at NHTSA ↗

I had two incidents with the Cadillac CT-4 in February and then again in April of 2026 of driving on I-75 at a highway speed of about 70 MPH when the vehicle suddenly downshifted and the engine revving at at very high RPM. The vehicle slowed down suddenly and it felt for a moment that I could not control the speed. The check engine light was on and the diagnostic indicated a transmission/engineer problem and to take in to service within a day. Both incidents in February and April felt the same. Both times I pulled over to the shoulder to sh…

Owner-reported narrative. Look up ODI 11752429 at NHTSA ↗

Engine and transmission for the second time in 90 days apart. Supposedly be a new part. I don’t think so.

Owner-reported narrative. Look up ODI 11586038 at NHTSA ↗

While driving the power steering was lost. The the auto hold function lit up. The collision warning light lit up. The stabilitrak system lit up. The air bag safety system lit up. Steering became very hard and made for y safe driving. Later that day 01-22-24, all warning light went out and power steering was normal.

Owner-reported narrative. Look up ODI 11567425 at NHTSA ↗

While driving at higher speeds the multiple CT4 vehicles that I have driven share steering issues. While driving straight, there are no issues. If following gentle bends in the highway to the RIGHT, randomly the vehicles will increase the force required to maintain the current ground track. This causes the vehicle to slightly pull away from the desired track to the left. It does NOT occur when steering to the left, only to the right. It feels as if the steering enters a different type of steering mode and eases the required steering wheel press…

Owner-reported narrative. Look up ODI 11498610 at NHTSA ↗

The contact owns a 2020 Cadillac CT4. The contact stated while driving 70 MPH, on several occasions, the vehicle failed to accelerate, hesitated, and then stalled. The vehicle was towed on three occasions to the local dealer, who was unable to determine the cause of the failure. There were no DTC codes retrieved. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 45,000.

Owner-reported narrative. 45,000 miles reported. Look up ODI 11592549 at NHTSA ↗

The vehicle shudders and loses power when accelerating fast. My wife almost got hit when she pulled out in traffic the car stalled out. It is due to the cylinder deactivation (afm).

Owner-reported narrative. Look up ODI 11742821 at NHTSA ↗

The contact owns a 2022 Cadillac CT4. The contact stated that while driving approximately 60-65 MPH, the power steering and power brakes failed to operate as needed. The check engine and the crash warning lights were illuminated. The contact coasted to the side of the road while depressing the brake pedal with an excessive amount of force. The vehicle was stopped by bumping on a nearby curb. Once the vehicle was stopped, the contact turned off and restarted the vehicle and was able to regain power steering and power brakes functionality. The ch…

Owner-reported narrative. 9,000 miles reported. Look up ODI 11567176 at NHTSA ↗

On or about XXX, I was the authorized subscriber and driver of a 2026 Cadillac CT4 owned by Flexcar, VIN [XXX]. While driving near [XXX] and [XXX], multiple dashboard warning lamps suddenly illuminated and a brake-assist warning appeared. The braking response became abnormally stiff or limited, and I nearly rear-ended another vehicle. The suspected systems are the service-brake/brake-assist system and the vehicle’s electrical or electronic-control system. The exact cause is UNKNOWN. There was no separate advance warning immediately before the …

Owner-reported narrative. Look up ODI 11761162 at NHTSA ↗