AI DamageCadillac CT6: problems, complaints, bulletins
Summary for the Cadillac CT6 across 6 model years: 77 owner complaints and 1,239 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Powertrain 61% of all complaints
- 2 Engine 10% of all complaints
- 3 Service brakes 10% of all complaints
- 4 Electrical system 9% of all complaints
- 5 Forward collision avoidance 6% of all complaints
- 6 Structure 5% of all complaints
- 7 Steering 5% of all complaints
- 8 Suspension 5% of all complaints
- Powertrain: 47 complaints (61% of all); manufacturer bulletins for this component: 451.
- Engine: 8 complaints (10% of all); manufacturer bulletins for this component: 392.
- Service brakes: 8 complaints (10% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 152.
- Electrical system: 7 complaints (9% of all); manufacturer bulletins for this component: 793.
- Forward collision avoidance: 5 complaints (6% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 59.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2 L · petrol · turbo · 4 cyl 2016–2019
- 3 L · petrol · turbo · 6 cyl 2016–2019
- 3.6 L · petrol · 6 cyl 2016–2020
- 4.2 L · petrol · turbo · 8 cyl 2019–2020
- 2 L · plug-in hybrid · turbo · 4 cyl 2017–2018
- automatic, 8-speed 2016–2018
- automatic, 10-speed 2019–2020
- CVT 2017–2018
Drive: AWD, RWD
Symptoms owners describe
How many of the 77 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Powertrain | 47 | 0 | 451 |
| Engine | 8 | 0 | 392 |
| Service brakes | 8 | 1 | 152 |
| Electrical system | 7 | 0 | 793 |
| Forward collision avoidance | 5 | 1 | 59 |
| Structure | 4 | 1 | 152 |
| Steering | 4 | 0 | 91 |
| Suspension | 4 | 1 | 86 |
| Fuel/propulsion system | 4 | 0 | 39 |
| Wheels | 3 | 1 | 217 |
| Visibility | 3 | 0 | 95 |
| Air bags | 2 | 2 | 26 |
| Vehicle speed control | 2 | 0 | 25 |
| Tires | 1 | 0 | 113 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The contact stated that her husbands air bag did not deploy. Medical attention was needed, and the contact's husband was transported to the hospital, where he succumbed to his injuries. A police report was taken. The vehicle was towed to the tow lot, where it was deemed a total loss.
latelyi have had a problem with my back hatch door opening by it self the problem the last time it happen just before i enter a car wash now ive got a 7800 bill to repair it
Vehicle involved in a severe accident, airbags did not deploy. The vehicle was in motion on a hwy. Vehicle was struck by oncoming traffic and then launched into a ditch. None of the airbags deployed during the incident.
I have had some instances where when backing up, in a completely empty parking lot or street and the car will brake on its own. There are no posts, trees or any objects like that anywhere nearby to trigger the braking. The marysville (ohio) police department responded to the accident.
It wouldn't start didn't care what gear it was in it was rolling and almost ran over my friend and ran off into a ditch. I have had several accidents in car due to the rear suspension. Shaking. I brought it in and no one can seem to duplicate it.
The contact stated that while driving at an undisclosed speed, the transmission unexpectedly shifted hard, and the service warning light was illuminated. The contact stated that while accelerating and decelerating, the vehicle shuddered and hesitated. There was smoke coming from the vehicle.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it
- This PI communicates the proper part numbers for transmission connectors and internal harness to prevent…
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- PI to help diagnose A/C concern
- This Preliminary information communicates an issue with an OTA pending message still displayed after an…
- Pi created to provide GM dealers with information on gathering information for projection issue
- This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- This preliminary information communicates information about how to determine if a wheel and tires size…
- This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a…
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic…
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.