CADILLAC Complaints

On or about December 2, 2025, I discovered that multiple connected and safety-related systems on my 2025 Cadillac Optiq had stopped functioning. We believe a GM over-the-air software update was installed the weekend prior, and the dealer has inferred that the update may have caused the failure. We brought the car into the dealership on December 16th. The car was "fixed" and I picked up later that evening. i was told that the OnStar module is broken and is on national backorder. The OnStar module is connected to, several critical safety and driver-assistance systems which are inoperable. These include, but are not limited to: OnStar emergency services driver-assist systems, GPS and navigation functions Bluetooth, Wi-Fi, and vehicle internet connectivity. Although the vehicle is technically drivable, the loss of these systems poses a significant safety risk to occupants and others on the road. The vehicle cannot contact emergency services in a collision, cannot send diagnostic data, and lacks essential driver-assistance and navigation capabilities. The dealer has confirmed the problem, but the replacement telematics module is currently backordered with no clear timeline, and they stated the delay could last weeks or longer. Because the failure appears to have been caused by a GM-issued OTA update, and because essential safety systems are offline, I am concerned about both the defect itself and the extended inability to repair it due to unavailable parts. UNKNOWN whether GM has conducted a broader inspection or analysis of this update or component, but the failure has been reproduced and confirmed by the dealer’s service department.

Loud knocking sound in the engine appeared out of nowhere. This is the same engine as what exists in the 2021 year models which does have a recall on them, but for some reason the 2019 models like I have are not included in the recall. I cannot drive the car for fear of the engine seizing up.

The contact owns a 2025 Cadillac XT4. The contact stated that the vehicle independently started after it was parked and turned off. The contact stated that the failure was intermittent but was a recurring failure. There was no warning light illuminated. The vehicle was taken to a local dealer, where it was diagnosed, and determined that the computer system needed to be reset. The vehicle was repaired; however, the failure reoccurred. The manufacturer was not informed of the failure. The failure mileage was approximately 17,000.

The vehicle has experienced repeated fuel system failures. The fuel pump control module (FPCM) is a known General Motors issue on similar vehicles, but this specific vehicle was not included in a recall. The vehicle now displays diagnostic trouble code P2635 – Fuel Pump Flow Performance. The engine hesitates and loses power during acceleration, especially under load or when the vehicle is warm. Prior to this code, the vehicle repeatedly reported fuel injector-related faults. Four fuel injectors have already failed and required replacement, causing significant financial loss. Based on diagnosis, the injector failures appear to be secondary damage caused by improper fuel control from the fuel pump control module. This condition creates a potential safety risk due to unexpected hesitation and reduced engine power while driving. The issue appears to be related to a systemic electronic fuel control problem rather than normal wear.

While driving my 2023 Cadillac Escalade (approx. 42,308 miles), the vehicle experienced a sudden and complete loss of power while accelerating on a busy highway. Engine power shut down without warning. I was able to pull to the shoulder, but the vehicle then became non-responsive and would not restart. The failure appears related to the electrical/charging system (12V battery, battery management system, alternator, or related modules). The vehicle is available for inspection upon request. This failure placed my family and others at serious risk. The loss of propulsion occurred in traffic, creating a collision hazard. After stopping, the vehicle had no heat and limited power while unable to start leaving us stranded on the shoulder of a heavily traveled highway in 10-degree weather. My two toddlers were in the vehicle, creating additional risk from traffic exposure and cold. This was a repeat incident. Approximately two weeks earlier, the vehicle experienced a similar power loss. A Cadillac dealership replaced the 12V battery and stated the issue was resolved. However, on January 22, 2026, I contacted the dealership and provided a video showing abnormal starting behavior, indicating the problem may not have been fixed. I followed up by phone the next day but received no response. Despite this prior repair and warning, the same failure occurred again. There were no clear warning lights or messages immediately prior to the power loss. After the failure, the vehicle was unable to restart. I also attempted to use OnStar, a paid emergency service, but was placed on hold for approximately 30 minutes. Due to unsafe conditions, my wife had to come pick us up to remove our children from danger. This incident involves a repeat loss of power while driving, prior warning signs, and failure of emergency support systems, raising serious safety concerns.

I have a 2017 Cadillac xt5 which the transmission is kicking and has a shattering issue car was just over the warranty and was told I have to pay for a replacement car had 70k miles and was told from a mechanic that there was a recall on these cars when I checked my vin the car is not under recall but is presenting the same issue as the ones under recall.. I took it to amoco replace fluid and car still has issue. Iam trying to see my options on how to go about it..

The engine suddenly stalled while I was driving on a public road, creating an immediate safety hazard. The check-engine light came on, and the dashboard warned of zero oil pressure. I had no choice but to have the vehicle towed to a Cadillac dealership. After their inspection, I was informed that the engine had catastrophically failed and required full replacement. This failure occurred right after the recall work was completed, during which I was assured the engine was healthy and the new oil- viscosity procedure had been performed.

Driver Side Headlight erratic flicker while parked. Low beam unexpectedly turns on and turns off. Causes eyeball light sensitivity upon approach and could cause epileptic seizures for some. Problem has been replicated by dealer with video evidence provided by me. First attempt to fix was to provide software updates. That did not remedy. The second attempt was a full and complete inspection of all wires and modules which were in tact followed by a full replacement of the headlight assembly. This also did not remedy. The third attempt did not perform any action and to mark the concern as "operating as intended." No warning lamps or other indications except being in front of the vehicle while it occurs.

The contact owns a 2022 Cadillac Escalade. The contact stated that while driving 45 MPH to the dealer, the vehicle experienced reduced engine power. The vehicle was driven to the dealer and was diagnosed with engine failure. The dealer determined that the engine needed to be replaced and related the failure to NHTSA Campaign number: 25V274000 (Engine and Engine Cooling). The VIN was associated with the recall. The vehicle was not yet repaired. The manufacturer was not contacted. The failure mileage was approximately 37,600.

Multiple issues: Leaking transmission fluid, multiple issues with on star system, side detection system, lane keep assist. On star issue involves being unable to contact an advisor in the case of an emergency. Apps in car work intermittently, including Google Maps which is imbedded in the vehicle system. Dealership has stated that onstar and map issue is ongoing and multiple complaints have been received about this issue. Transmission leak started appears to have started right after the purchase of the vehicle. Lane Keep assist and side detection system displayed error message stating that the systems needed to be serviced.