Problems · NHTSA complaints
2017 Cadillac CT6 problems
Owners filed 26 complaints about the 2017 Cadillac CT6 with NHTSA between Aug 2017 and May 2026. The most-cited component is power train (17).
Complaints
26
Filed with NHTSA
Crashes
0
Reported by owners
Fires
0
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Power train17
- Electrical system5
- Vehicle speed control2
- Structure2
- Service brakes2
- Engine2
- Suspension1
- Wheels1
- Fuel/propulsion system1
- Forward collision avoidance1
- Tires1
- Steering1
- Visibility1
- Visibility/wiper1
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 10, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
2
3
3
3
3
3
2
2
3
2
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 2 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Power train
17 reports
“The vehicle experiences harsh shifting, surging, and jerking forward during normal driving conditions. The behavior has occurred repeatedly over several years and has been confirmed by the dealership. Multiple repair attempts, including transmission-related work, have not resolved the issue. The vehicle has surged forward unexpectedly, creating near-miss accident situations. I no longer feel the vehicle is safe to operate.”
Electrical system
5 reports
“Water is getting into my trunk where the amp is and now my radio does not work only the back up camera. I cannot control the AC or turn on the air conditioner. Or is that how I would like it to blow”
Vehicle speed control
2 reports
“My vehicles transmission has a buzzing noise coming from the transmission oil pan and a gear shifting problem I took vehicle to Cadillac dealer whom can’t find the issue they changed the oil pan and the transmission lines . My vehicle is a 2017 Cadillac ct6 with 72027 miles . I’ve been to 4 Cadillac certified dealers and none can locate to problem . Thank you . Also I would like to add that Cadillac open road In New Jersey has taken off my splash guards and would not return them . I have a video of the manager claiming the car doesn’t come with guards and another stating the job he did not require him to remove splash guard but that is not true .”
Structure
2 reports
“TL* THE CONTACT OWNS A 2017 CADILLAC CT6. DUE TO THE CHANGES IN THE WEATHER, THE REAR WINDOW HAD A MARBLEIZED HAZE COVER, WHICH MADE VISIBILITY OUT OF THE WINDOW EXTREMELY DIFFICULT. THE VEHICLE WAS TAKEN TO SCHOOLEY CADILLAC (2101 45TH ST, WEST PALM BEACH, FL), BUT THE CAUSE OF THE FAILURE COULD NOT BE DETERMINED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE, BUT NO SOLUTION WAS OFFERED. THE FAILURE MILEAGE WAS 0. *TT VEHICLE PURCHASE DATE SHOULD BE ON OR BEFORE INCIDENT DATE. *JB”
Service brakes
2 reports
“Transmission - Jerks and studders (hesitation) in the course of normal driving. Brakes - Makes a squealing noise which has gotten louder over time.”
Engine
2 reports
“WHEN AUTO STOP IS ENGAGE TAKING YOUR FOOT OFF THE BRAKE PEDAL FROM A COMPLETE STOP WHEN THE ENGINE STARTS BACK UP IT HAS A HARSH JERK SOMETIMES, IT FEELS AS THOUGH SOMEONE HAS HIT YOU FROM THE REAR. THIS BEEN GOING ON FOR THREE YEARS THE CAR HAS BEEN IN SERVICE TWICE FOR THIS PROBLEM THE SERVICE TECHNICIAN CANNOT DUPLICATE IT. *TR”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.