What breaks most · 2016 to 2020 model years
Cadillac CT6 problems by year
Owners have filed 64 safety complaints with NHTSA about the Cadillac CT6 across model years 2016 to 2020. Three years stand out: 2017 for powertrain and transmission complaints, 2019 for powertrain and transmission complaints and 2016 for powertrain and transmission complaints.
- Years to check closely: 2017, 2019, 2016
- Complaints on file
- 642016 to 2020, all trims
- Worst year
- 201717 complaints
- Crashes reported
- 40 fires · 2 injuries · 1 deaths
- Typical failure mileage
- 20kMedian where owners gave mileage
- Recall campaigns
- 10Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 11 | 3 | 3 | Powertrain and transmission (6) | |
| 17 | 0 | 1 | Powertrain and transmission (10) | |
| 9 | 0 | 0 | Powertrain and transmission (3) | |
| 16 | 0 | 4 | Powertrain and transmission (13) | |
| 11 | 1 | 2 | Powertrain and transmission (6) |
What fails on the 2017 Cadillac CT6
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Powertrain and transmissionTransmission parts | 59% |
10 | 0 | Shop all powertrain and transmission parts, not filtered to this vehicle |
| Electrical systemAlternators, starters and ignition | 24% |
4 | 0 | Shop electrical system parts for the 2017 Cadillac CT6 |
| BrakesBrake pads, rotors and calipers | 12% |
2 | 0 | Shop brakes parts for the 2017 Cadillac CT6 |
| Speed control and throttleThrottle and pedal sensors | 12% |
2 | 0 | Shop speed control and throttle parts for the 2017 Cadillac CT6 |
| EngineEngine gaskets and seals | 6% |
1 | 0 | Shop engine parts for the 2017 Cadillac CT6 |
| Wheels | 6% |
1 | 0 | — |
| VisibilityMirrors and glass | 6% |
1 | 0 | Shop all visibility parts, not filtered to this vehicle |
| Unknown or other | 6% |
1 | 0 | — |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
Transmission - Jerks and studders (hesitation) in the course of normal driving. Brakes - Makes a squealing noise which has gotten louder over time.
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ABS system error StabiliTrak error Cruise Control error Vehicle with <14,000 miles is exhibiting symptoms of earlier ABS recall.
-
Vehicle has sudden violent forward Jerking motion at stops, delayed performance when accelerating ,hard shifting when changing gears, clunking noise when shifting into low gear
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 6, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Cadillac CT6 years have the most problems?
By NHTSA complaint volume, 2017, 2019, 2016 carry the most filings on the Cadillac CT6. The 2017 alone has 17 complaints, led by powertrain and transmission.
What is the most common Cadillac CT6 problem?
On the 2017 model year, the most-reported component is powertrain and transmission with 10 complaints. The table above lists the top components for every year.
At what mileage do Cadillac CT6 problems start?
The median mileage at failure across all Cadillac CT6 complaints that include mileage is about 20,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.