What Cadillac CT4 owners have reported to NHTSA, the service bulletins the manufacturer sent dealers, and any federal defect investigations, by model year. See Cadillac CT4 safety recalls or check your VIN.
Complaints owners filed with NHTSA, by the model year of the vehicle. A high count can also mean a popular year, so compare it with how many were sold.
| Year | Complaints | Crashes | Fires | Injured | Deaths | TSBs |
|---|---|---|---|---|---|---|
| 2026 | 1 | 0 | 0 | 0 | 0 | 87 |
| 2025 | 2 | 0 | 0 | 0 | 0 | 238 |
| 2024 | 7 | 1 | 0 | 0 | 0 | 394 |
| 2023 | 3 | 0 | 0 | 0 | 0 | 551 |
| 2022 | 6 | 1 | 0 | 1 | 0 | 743 |
| 2021 | 7 | 0 | 0 | 0 | 0 | 813 |
| 2020 | 8 | 0 | 0 | 0 | 0 | 888 |
The vehicle systems named most often in Cadillac CT4 complaints (one complaint can name several).
In the owners’ own words, as filed with NHTSA. Unverified reports; NHTSA removes personal details before publishing.
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 vehicleâs electrical or electronic-control system. The exact cause is UNKNOWN. There was no separate advance warning immediately before the incident; the warning lamps and brake-assist message appeared when the malfunction began. I photographed the illuminated dashboard. A similar event …
Total brake system failure. Lost almost all brake function nearly causing an accident. June 17, 2026 car was taken to dealership. Electronic Brake Control Module (EBCM), Brake Master Cylinder, Brake Pedal Retainer replacement required. August 7, 2026 received a call from dealer stating that EBCM replacement was faulty or failed. August 26, 2026 Contacted GM to ask for inclusion in recall 20V588000. Was refused inclusion. 70 days out of service and was forced to sell vehicle due to safety concern, extended repair schedule and cost of a vehicle I could not use. Two EBCM replacements and vehicle is still out of service as of August 26, 2026.
69,000 mile oil change I was told i needed to spend thousands of dollars on repairing an oil leak b/c my Cam carrier is leaking. Cadillac has a know issue with this repair and refuses to stand behind it's product. Numerous complaints already on forums and yet they charge thousands to fix. A top name brand that can't produce a vehicle past 69000 miles without a major issue. I wanted to make it known about the ongoing issue by Cadillac. So sad.
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 shut the engine. I waited and in February it restarted without the engineer revving high. In April, it still revved high. When I took it to Ed Morse …
While driving at highway speeds on the freeway in my 2021 Cadillac CT4-V, the vehicle experienced a sudden, catastrophic loss of propulsion. Without warning, the transmission dropped out of gear as if it were in neutral. I completely lost the ability to accelerate, creating an immediate, life-threatening hazard as I was left stranded and blocking high-speed freeway traffic. Only after the mechanical failure occurred did the check engine light illuminate. The vehicle was towed to Cadillac Dealership. The service department confirmed that the vehicle suffered from the known defective transmission control valve covered under GM Special Coverage Bulletin N242480631 and tied to NHTSA Campaign 25V…
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 dealership currently with all active codes and faulty equipment. I contacted GM and tried to get some help with this issue and they refuse to help since it …
I took my car to Fields Cadillac Jacksonville for routine oil change and to rotate/balance tires. I was inform via video message that I had an oil leak coming from the camshaft carrier reseal and requires immediate attention.
The contact owns a 2024 Cadillac CT4. The contact stated that while attempting to park the vehicle, there was an abnormal engine oil burning odor around the exterior of the vehicle. No warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed with a camshaft carrier reseal leak. The vehicle was not repaired due to the cost. The manufacturer was not made aware of the failure. The failure mileage was approximately 85,305.
Repair instructions and other communications the manufacturer sent dealers about known issues. A TSB is not a recall, and the repair is usually free only while the car is under warranty; ask your dealer for the bulletin number.
This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
⢠Fixes to help prevent loss of audio ⢠Better connectivity for Bluetooth and CarPlay ⢠Improved performance for vehicle software updates
This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior.
This PI advises of a procedure for a Service Door Latch System message with No Related DTCs
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with the image processor #2 and how to restore communication
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is currently investigating.
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
⢠Improvements to system responsiveness ⢠Improvements to camera image clarity ⢠Fixes to prevent blank screens and audio drop-outs ⢠Improvements to vehicle software update installation
NHTSA’s Office of Defects Investigation opens these when complaints point to a possible safety defect. Many end in a recall.
On April 9, 2021, the Office of Defects Investigations (ODI) opened PE21-010 to investigate instances of air bag malfunction indicator light (MIL) illumination and potential for frontal air bag non-deployment in several vehicles manufactured by General Motors (GM). The vehicles included model year (MY) 2020 through 2021 CT4 and CT5 passenger cars, Sierra and Silverado trucks (1500/2500/3500 models), XT4 and MY 2021 Escalade, Suburban, Tahoe, Yukon SUVs.Technical Service Bulletin (TSB) 21-NA-005,
Source: NHTSA Office of Defects Investigation public data (complaints, manufacturer communications, investigations), model years 2010 and later. Had a safety problem? Report it to NHTSA.
In complaints filed with NHTSA for model years 2020–2026, owners most often name: engine, service brakes, electrical system. 34 complaints are on record.
No. A complaint is an unverified report from an owner. A technical service bulletin (TSB) is the manufacturer telling dealers how to fix a known issue; it is not a safety recall and is usually covered only under warranty. A recall is a formal safety action, and its repair is free.
File a vehicle safety complaint at NHTSA.gov. NHTSA reads every report, and patterns of complaints are what open defect investigations and, eventually, recalls.
