2024 Cadillac Lyriq problems

Filed Nov 3, 2026 · Brakes, Driver assistance · CT

My Cadillac Lyriq slams the brakes on when driving forward or in reverse with nothing in its path. This makes me very nervous to drive the vehicle as it is unpredictable as to when it happens. It scares me and affects my confidence in driving the vehicle. The entire vehicle also without warning goes completely dark meaning the screen and the entire vehicle just shut off.

Filed Nov 3, 2026 · Brakes, Driver assistance · CA

While driving, my brakes suddenly grabbed so hard that it felt as though we were hit from behind or hit a large pot hole. There was no hole, we were not hit from behind and the brakes released immediately. We were fortunate that there was no vehicle behind us as it could have caused a collision. We were not going more than 20 mph. This has happened three times in the last 4 months. Our dealership claims there is no recall or knowledge of this happening to others.

Filed Oct 30, 2026 · Brakes · 27,876 miles · TX · crash

The contact owns a 2024 Cadillac Lyriq. The contact stated that while driving 40 MPH and attempting to depress the brake pedal, the brakes failed to respond. The contact was unable to stop in time and crashed into the vehicle ahead. While attempting to avoid crashing into the vehicle ahead, the contact steered over to the right but crashed with the other vehicle. The contact received notification of the federal safety agency Campaign Number: 26V717000 (Service Brakes, Hydraulic); however, the part to do the recall repair was not yet available. The failure mileage was 27,876.

Filed Oct 26, 2026 · Brakes · AZ · crash

I was parking in the garage and only tapped on the gas to move a little bit forward and the car accelerated on its own into a racking system and that racking system went through the wall of our home. I was only trying to move further up and barley touched the gas and then the car accelerated into the storage racking system

Filed Oct 23, 2026 · Electrical · FL

My 2024 Cadillac LYRIQ, VIN [XXX], has a recurring 12V/electrical problem that has caused repeated battery failures and no-start conditions. At 4,716 miles, the vehicle would not start, the dash went black, and “Service Battery Fault” appeared. Cadillac tested the 12V battery, documented that it FAILED, and replaced it. Only 367 miles later, at 5,083 miles, the vehicle displayed “Electric Drive Unit Immediate Attention” and “Limiting Features to Save Battery.” Cadillac documented code U2C11 and performed BECM/Hybrid-EV Battery Pack Communication Module programming/reset. At 12,839 miles, Cadillac documented another electrical issue: the radio and display would not turn off after the vehicle was shut off. The system required reprogramming. At 16,040 miles, the LYRIQ again became completely inoperable and had to be towed to Cadillac. The dealer again documented that the 12V battery FAILED testing and had to be replaced for the vehicle to start. I am concerned that repeated battery replacement is treating the symptom rather than correcting an underlying electrical defect. A vehicle that repeatedly loses its low-voltage electrical system and becomes completely inoperable presents a safety concern because the driver can be unexpectedly stranded. I request that the federal safety agency investigate recurring 12V battery, electrical-module, battery-drain and no-start failures in 2024 Cadillac LYRIQ vehicles. I have dealer repair records documenting these incidents. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 17, 2026 · Electrical · GA

On or about August 6, 2026, I received email communication from the GM EV Concierge , establishing Case #106606137. My vehicle has been "bricked" and GM has had possession of it since August 3, 2026, (46 days and counting) without so much as an official diagnosis or repair timeline. I have repeatedly been told that the matter has been “escalated,” that GM is “working with the dealership,” and that the repair is being “expedited,” however, I don't know to whom it has been escalated, but at this point I have not received any measurable result rather than continuous general status statements. Regardless, the practical result remains undisputed: my vehicle continues to be unavailable, my vehicle has yet to receive an official diagnosis, and I have yet been provided with a reliable repair timeline. GM continues to route my vehicle through a process that has failed to produce an official diagnosis does not resolve the underlying problem. More importantly, it does nothing to address the fact that I remain without the leased vehicle I am paying for while it is under warranty. Because GM continues to possess my vehicle, I have been required to incur over $3,000.00 in transportation and other expenses that I would not otherwise have incurred, not including the sheer amount of time my wife and I have wasted! I specifically request that GM address its own published Trip Interruption Benefits and Assistance provision. GM’s warranty and roadside-assistance states: “Trip Interruption Benefits and Service: If your trip is interrupted due to a warranty failure, incidental expenses may be reimbursed during the Powertrain warranty period. Items considered are hotel, meals, rental car, or a vehicle being delivered back to the customer, up to 500 miles.” I did not ask GM to make an unsupported goodwill payment. I asked GM to determine whether the circumstances I have experienced qualify for consideration under GM’s own published Trip Interruption Benefits and Assistance provision.

Filed Sep 1, 2026 · AZ

The vehicle is a Cadillac Lyriq. Following an over the air software update pushed by the manufacturer, the vehicle began displaying a high voltage system error message and lost the ability to DC fast charge. The high voltage components themselves are reported to be functional, the issue appears to be caused entirely by the software update rather than a hardware failure. The vehicle has been at an authorized dealership service center since August 14, 2026, awaiting a resolution. The dealership has confirmed the fault is present and is consistent with a known issue caused by the manufacturer's software update, but has not been able to repair it independently, since the fix requires a corrected software release from the manufacturer. As of this writing, the manufacturer has not issued the corrected update and has not provided a timeline for when one will be available. This creates a safety risk because the vehicle cannot be relied upon for longer trips or situations requiring DC fast charging, which can leave the driver stranded or unable to reach a destination or charging option within a safe range, particularly in hot weather conditions common in this region. The warning message and loss of fast charging capability appeared immediately after the software update was applied, with no prior symptoms. It is unknown whether the manufacturer has independently inspected this specific vehicle beyond the dealership's diagnosis. The high voltage system and charging hardware remain available for inspection upon request. Multiple other owners of this same model have reported the identical issue following the same software update, suggesting this is a widespread defect rather than an isolated incident.

Filed Aug 22, 2026 · Electrical, Fuel system · MA

On August 9, 2026, at approximately 3:40 a.m., while driving, the vehicle suddenly lost all propulsion and became completely disabled on the roadway. The vehicle remained powered on but would not move forward or backward. At approximately the time of the failure, Cadillac/OnStar Advanced Diagnostics generated a critical Electric Drive Unit warning instructing immediate service and reported diagnostic code P0A78. Additional vehicle diagnostic warnings involved the electric drive unit/high-voltage propulsion system. I immediately contacted roadside assistance but was unable to obtain a workable towing solution for several hours. The vehicle ultimately had to be privately towed and has remained undriveable since the incident. The loss of propulsion occurred unexpectedly while the vehicle was being driven, without advance warning that would have allowed me to safely plan for the vehicle to become disabled. I am concerned that the same sudden loss of propulsion could occur at higher speed, in traffic, at an intersection, or in another location where an unexpected loss of motive power could create a serious crash risk. The vehicle requires diagnosis and repair for the Electric Drive Unit/P0A78 condition.

Filed Jul 27, 2026 · Driver assistance, Electrical · CO

The infotainment screen in my car plus the menu control went completely dead. With the screen dead completely this mean you cannot see the speedomoter, rear camera feeds, warning symbols on the dash. You cannot see current speed, you cannot hear any sound so all alerting systems are down. You are completely blind in a vehicle built around this screen. Dealership has already confirmed faulty computer module. However was told it would have been originally resolved under N252500680. It has only been inspected by the manufacture. No warnings, no nothing, just dead screen out of nowhere that requires new part to bring online. Meaning dead dead; part is currently on back order and design changes were made after this exact model year showing knowledge of the fault.

Filed Jul 27, 2026 · Driver assistance · VA

This is about an issue with the ACC system. While driving with the ACC engaged, it will intermittently disengage and without notification. Then the vehicle applies hard braking. After many multiple occurrences, I now tap the brake pedal and apply acceleration. I can't tell you how concerning this can be while driving at interstate speed. Just the thought of a large truck behind me will put the fear into you. Additionally, I have been able to hear an electrical clicking noise emitting from the left side of the steering wheel. When this occurs the ACC is unavailable and/or unable to be selected. A barrage of notifications will appear saying the Adaptive Cruise Control Selected or Cruise Control Selected. Our Lyriq has been in the shop for this problem at least 3 times. Everytime the outcome is CND or WAD