2026 Cadillac Lyriq problems

“The contact owns a 2026 Cadillac Lyriq. The contact stated that while performing a three-point turn at approximately 5 MPH, the brake pedal was depressed; however, the brake pedal became hard, the vehicle failed to stop, and continued moving forward and backward continuously, resulting in a collision with an unoccupied, parked vehicle. In addition, the contact stated that prior to the incident, the vehicle sensing system was overly sensitive, causing premature stopping while coming to a stop. The contact stated that the failure was associated with NHTSA Action Number: EA26006 (Service Brakes). The manufacturer was notified of the failure by phone, filed a case, and referred the contact to the dealer for diagnostic testing. The insurance company was notified of the incident. The failure mileage was approximately 10,000.”

“On October 28, 2026, my spouse was driving our 2026 Cadillac LYRIQ Premium Luxury RWD on the highway when the vehicle unexpectedly displayed a warning and began losing propulsion, progressively decelerating without driver command. Multiple additional warnings appeared, including Service Traction Control, Service Battery, Brake System Failure, and a 62 mph maximum speed restriction. The driver was overwhelmed by the rapidly appearing warnings and unexpected deceleration. She believes she was able to use the brakes, but cannot reliably recall the vehicle's precise braking behavior during the incident. After the vehicle stopped, she contacted OnStar. During the call, the vehicle experienced a complete apparent electrical shutdown: the displays went dark, the vehicle became unresponsive, and the OnStar call disconnected. Around the time of the incident, OnStar generated two diagnostic notifications: a critical electric drive unit malfunction with diagnostic trouble code P0560, followed approximately two minutes later by a low 12V battery warning. The vehicle could not be restarted or driven and required towing to an authorized Cadillac dealership. This unexpected…”

“7/16/2026 I was at Powerhouse gym hall road clinton township Michigan. I was backing out of parking space had seat belt on placed into reverse checked backup screen clear, rear view mirror and mirrors on doors. Backed out half way and rab automatic braking slammed (( twice in a row)) felt like hitting brick wall no one or obstacle near car or behind me. The car starts to go forward with in a foot front automatic braking detects car next to me slams on braking system pushes car back, Car then begins to rock between two sensor back and forth, Until front system fails to stop I sense its about to move forward an impact cars around me. Depressed brake to the ground it failed to stop, Screen flickers turns blank and I have no way to power off car, It proceeds to hit four parked cars and this cars cause damage to cars next to them. I seen article 8.27.2026 regarding GM investigation describing what I experienced currently NHTA is invetigation ?? I do not know my next step s Im being held responsible by insurance, Clinton Twp , Mi police gace me reckless driving ticket im going to court 9.3.26 to contest and there ordering driving review. I have driven 40 years no…”

“MALFUNCTION: In normal driving mode the stop lamp / brake lights do not shut off after releasing the braking controls. The stop lamps will shut off only after the accelerator pedal is used, or when the vehicle coasts below 10mph. SAFETY: 1) When descending mountain roads the stop lamps remain illuminated for extended periods of time. In some cases the stop lamps remain illuminated for hundreds or thousands of feet after the brake controls have been released. In these situations the vehicle is now coasting downhill and NOT decelerating. In these situations there is no indication / communication provided to the traffic behind me that I am now braking and no longer coasting since the stop lamps have remained on since the previous braking event. 2) In addition, I am unable to communicate to vehicles behind by flashing my stop lamps multiple times by multiple taps on the brake pedal. The first use of the brake controls cause the stop lamps illuminate and they will remain illuminated until I use the accelerator. CONFIRMED: I have communicated with my local Cadillac dealer and they have confirmed this takes place, and they call it a 'feature' of the vehicle. THIS IS…”