2023 Cadillac Lyriq

The Office of Defects Investigation (ODI) has received multiple Early Warning Reporting field reports alleging a loss of brake boost assist in MY2023 Cadillac LYRIQ vehicles. The reports allege a hard brake pedal, followed by a “Brake System Failure” message at start up or while driving. The EWR field reports have been verified by General Motors (GM). GM stated the electronic brake control module, also known as “eBoost”, has an internal spindle that can fracture during an Anti-Lock Braking System (ABS) event. GM further stated that due to the fracture, the vehicles can lose brake assist, experience speed limitation, and ABS would lose some functionality. GM indicated a new material clean break point was introduced in the assembly plants in May 2023.  GM has also developed an over the air (OTA) update, which will cycle the brake booster similarly to an ABS event at start-up for every key cycle. If the spindle fractures during this start-up cycling, a warning lamp will illuminate to prompt the customer to bring the vehicle to the dealership to be diagnosed and repaired under warranty. This software update was not conducted as a recall. ODI is opening this Preliminary Evaluation (PE) to determine the scope and severity of the potential problem and to fully assess the potential safety-related issues.

Backing out of driveway and screen went black and a collision occurred a second or two later. We have had the Lyriq in the shop multiple times for glitchy screens and screen going black but never has been fully resolved. I did recieve a recall letter (unfortunately I threw it away) but now it shows no recalls (strange). This black screen issue has been a problem since day 1 but now it has resulted in a collision. I have been unable to even back my car out of the garage when raining due to the sensitivity of the collision detect so there is NO excuse that it didn't alert. Cadillac has had the car since the accident and claim nothing is wrong with it and they are not responsible. I do not believe that. I have met with dealership GM who is looking into this further. I wanted to bring to the NTSB as this is 100% a safety concern. Thank God there wasn't a child on a bike or a baby in a stroller behind us. This didn't result in any human harm but the vehicle sustained damage that I believe was the direct result of malfunctioning technology on the car to prevent it.

NHTSA ID

11682101

Incident

Jul 1, 2025

The gauge cluster/infotainment screen dims automatically when the light sensor on the dash senses the environment has gotten darker. The problem is that this happens extremely early at dusk/dark hours when it's still fairly bright outside, and the brightness of the screen is too dim to see things clearly. Also, once this automatic dimming happens, there is no way to turn the brightness back up. This feature also CANNOT be disabled in the settings anywhere. This results in a safety issue where the screen is not sufficiently visible at times when the auto dimming (which is also tied to the automatic headlights) kicks in for the screen.

NHTSA ID

11630577

Incident

Dec 13, 2024

During dusk and dawn conditions, the vehicle dims the dashboard lighting to the point that everything is very difficult to see. They are diming the displays when the exterior lighting conditions are still too bright for the very dim display. I have owned many GM vehicles with this type of automatic diming and this is the ONLY vehicle that has this problem. There is NO user fix available. This is a safety problem and GM needs to be forced to provide a fix. Many owners complain about this problem and there is no fix available from dealers.

NHTSA ID

11630444

Incident

Nov 4, 2023

The entire left portion of the screen became inoperable and remained a black screen despite attempts to reset the system. The left side of the screen contains information such as gear selection, speedometer, lane keep assist, and many other important information. There is no other way to see what speed you are going besides this screen. Several others in my cadillac lyriq facebook group have experienced this issue, it is a major safety concern and needs to be addressed immediately before someone gets hurt from this.

NHTSA ID

11630145

Incident

Dec 4, 2024

Weather was dry. Time was 5:30 PM - still sunlit. Driving down the interstate, 70 MPH in the middle lane of a three lane highway. Super Cruise is active, no cars in front of me within 500+ feet. I MAY recall a partially blown tire in the lane to my left. All of a sudden, car brakes and slows abruptly to about to about 40MPH. I can not recall of brakes were active but my car was configured for "one pedal driving" so when the accelerator was disengaged, the brake is applied. "Service Driver Assist" warning comes on. The service driver assist icon on the dashboard remained yellow. The next morning, the service driver assist icon was gone.

NHTSA ID

11610956

Incident

Aug 22, 2024

Vehicle is automatically braking at low speeds when there is no reason to do so. It is as if the vehicle thinks something is there but there is nothing there

NHTSA ID

11607351

Incident

Aug 1, 2024

While transitioning to day to night, the instrument panel dims prematurely making the content very hard to see. This includes all indicators such as speed, turn signals, and other gauges and possible fault indications. This happens prior to dusk, when there is still plenty of daylight remaining. The headlights come on (this is fine), but the display dims to full night mode at the same time also. Although the instrument display night illumination level is adjustable with the dimmer switch, even at maximum setting the instrument panel cannot be well seen. Once the sun fully sets, the display visibility for night viewing is fine. The same issue occurs at the night to day transition. The display stays dim much too long into dawn, again presenting visibility issue of the controls and gauges during this time. This problem is not isolated to just my particular vehicle. When the vehicle was in the shop for various repairs, loaner Lyriq's provided exhibit the same issue. Both 2023 and 2024 model year, over various trims.

NHTSA ID

11598096

Incident

May 1, 2023

The Lyriq, as well as all current GM vehicles, use an icon on their instrument panel for indicating headlights are on that is incorrect. They use the symbol for parking lights rather than the symbol for low beam headlights on their instrument panel display. This is especially confusing because their own digital menu to turn on lights correctly shows the low beam headlights symbol for headlights, and the parking lights symbol for parking lights. However, turning on low beam headlights shows a parking lights indicator in the dashboard, and turning on the parking lights shows no indicator in the dashboard. It's my belief that, to help ensure no driver misunderstands what the symbols are indicating, that GM should have all vehicles properly use the low beam symbol for a dashboard indicator to show headlights, just like other vehicles use, rather than the parking lights indicator which is incorrect (both inconsistent with US convention, (as well as inconsistent with their own menu in the Lyriq specifically) to turn these lights on.

NHTSA ID

11576637

Incident

Mar 8, 2024

Certain vehicles may experience reduced or intermittent Telematics Control Module functionality. Dealers are to reprogram the Telematic Control Module to the latest software level.

This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.

PI to help diagnose A/C concern

• Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics

This Preliminary Information communicates that, under certain conditions, a MIL (Malfunction Indicator Lamp) illumination or a "Service High Voltage" message may display on the IPC (Instrument Panel Cluster), and the 12V battery may experience discharge.

This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.