2018 Cadillac CT6: complaints, problems and recalls
Explore the records behind recurring owner reports.
Key facts
9 owner complaints analyzed
0 distinct recall campaigns
28,750 mi median reported failure mileage
Scope: 2018 model year. Data snapshot: . 2 complaints include usable failure mileage.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Engine is the most frequently named component, appearing in 3 of 9 complaints (33.3%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Transmission and shifting | 2 | 22.2% |
| Braking behavior | 2 | 22.2% |
| Steering behavior | 1 | 11.1% |
| Fuel system concerns | 1 | 11.1% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Engine | 3 |
| Power Train | 3 |
| Fuel/Propulsion System | 2 |
| Steering | 2 |
| Exterior Lighting | 1 |
| Forward Collision Avoidance: Adaptive Cruise Control | 1 |
| Lane Departure: Assist | 1 |
| Service Brakes | 1 |
Engine: 3; Power Train: 3; Fuel/Propulsion System: 2; Steering: 2; Exterior Lighting: 1; Forward Collision Avoidance: Adaptive Cruise Control: 1; Lane Departure: Assist: 1; Service Brakes: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 1 |
| 25,000 to 49,999 | 1 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 1; 25,000 to 49,999: 1; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (1). 7 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2021 | 2 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 3 |
2021: 2; 2023: 2; 2024: 1; 2025: 1; 2026: 3
Pattern summary
Engine leads the component reports. Transmission and shifting appears in 2 complaint narratives. Braking behavior appears in 2 complaint narratives. Steering behavior appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Examples from the source records
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11389316 · 2021-01-21 (January 21, 2021)
MY CADILLAC CT6 (2018) QUIT WORKING WHILE ON THE EXPRESSWAY. I WAS IN THE MIDDLE OF NO WHERE, IN GEORGIA. THIS MADE FOR A VERY DANGEROUS SITUATION AS THE CAR SUDDENLY LOST ALL POWER GOING TO THE WHEELS WHILE DRIVING AT APPROX. 75 MPH. I WAS BARELY ABLE TO GET AROUND TRAFFIC TO BE ABLE TO PULL OVER AS THERE WAS 0 POWER. WHEN THE TOW TRUCK FROM CADILLAC ARRIVED WE WERE TOLD WE WERE NOT ALLOWED TO RIDE IN THE TRUCK BECAUSE OF COVID. WE WERE MADE SIT IN THE RAIN IN 40 DEGREE WEATHER WHILE I SPOKE WITH MY HOME CADILLAC DEALER AS WELL AS THE NEAREST …
Owner-reported narrative. 22,000 miles reported. Look up ODI 11389316 at NHTSA ↗
Owner report 11398939 · 2021-03-03 (March 3, 2021)
ON MAR 1, 2021 WHILE DRIVING SUPER CRUISE MODE, MY CAR JERKED VIOLENTLY TO THE LEFT ALMOST STRIKING ANOTHER CAR. I WAS ON THE FL TURNPIKE ABOUT 20 MILES NORTH OF ORLANDO HEADING SOUTH. THE HIGHWAY WAS INCREASING FROM 2 LANE TO 3 LANE SOUTHBOUND AND I WAS IN THE RIGHT LANE. WHEN I ENTERED THE LANE TRANSITION, THE CAR DRIFTED RIGHT . AS THE CAR CAME UPON THE NEW WHITE LINE THE CAR ABOUT CENTERED IT. THE CAR TURNED HARD LEFT, AND TURNED OFF SUPER CRUISE. FORTUNATELY, I WAS ABLE TO GRAB THE STEERING WHEEL AND CORRECT THE TURN. WE DID NOT CRASH, BUT…
Owner-reported narrative. 35,500 miles reported. Look up ODI 11398939 at NHTSA ↗
Owner report 11508253 · 2023-02-21 (February 21, 2023)
The brake makes a rattling and metal grinding sound, the dealership said nothing is wrong with the brakes, still problematic. The transmission shifts too hard. Dealer said nothing wrong. Yet cat kicks too hard.
Owner-reported narrative. Look up ODI 11508253 at NHTSA ↗
Owner report 11508275 · 2023-02-21 (February 21, 2023)
MY DRIVER FRONT HEAD LIGHT IS PARTLY NOT WORKING. I BELEIVE IT IS AN LED LIGHT AND THE FACT THAT IT NO LONGER WORKS IS NOT WHAT I EXPECTED FROM LED, IT SHOULD LAST MUCH MUCH LONGER THAN 5 YEARS; AFTER ALL IT IS A CADILLAC AND IT SHOULDN'T HAVE HAPPENED. I REQUESTED CADILLAC CORPORATE TO ASSIST ME WITH THIS AND ALL THEY WOULD DO FOR ME IS GIVE ME A $250.00 CREDIT TOWARDS THE REPAIR THAT IS APROX. $1,800.00 THIS HEAD LIGHT IS DEFECTIVE AND THEY SHOULD DO GOOD BY ME, THIS IS MY 5TH. CAR WITH THEM. THANK YOU FOR YOUR HELP [XXX] INFORMATION Redact…
Owner-reported narrative. Look up ODI 11508275 at NHTSA ↗
Owner report 11572148 · 2024-02-15 (February 15, 2024)
Yes my car was sold to me with structural damages, and I was told any of this when I purchased it!!!!
Owner-reported narrative. Look up ODI 11572148 at NHTSA ↗
Owner report 11707182 · 2025-12-26 (December 26, 2025)
Front differential case ripped in half and separated from the ring gear. The broken chunk of differential case and pinion was still attached to the driveshaft while coming to an abrupt stop. Damage done within driveshaft tunnel. No warning, no vibration, no cause for concern, just catastrophic failure. Differential and propeller shaft were replaced by an independent mechanic. Cadillac has not been notified as of today, receipt for repair available upon request.
Owner-reported narrative. Look up ODI 11707182 at NHTSA ↗
Owner report 11745961 · 2026-06-23 (June 23, 2026)
Stuck Thermostat. Vehicle not achieving operating temperature in the correct time. ALL 3 of the people I know with CT-6's had the exact same issue this year.
Owner-reported narrative. Look up ODI 11745961 at NHTSA ↗
Owner report 11755393 · 2026-08-07 (August 7, 2026)
During refueling the gas station pumping nozzle would shut off indicating a full gasoline fuel tank; but, the dash board fuel gage indicated the fuel was not full. Had to dribble in fuel to fill. Dealer Mechanic found: Crash roll over gasoline vent safety valve was stuck in the crashed roll over cut off state. No gas tank ventilation. This caused back pressure in car gasoline tank to shut off gas station filler nozzle as though the car was full . Entire gas tank had to be replaced. Still under warranty.
Owner-reported narrative. Look up ODI 11755393 at NHTSA ↗
Recall history
0 distinct campaigns affect this selection. Announcement dates below are different from vehicle model years. A campaign may cover multiple years.
No recall campaigns are recorded in this snapshot.