Most common 2017 Cadillac CT6 problems
Share of the 17 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Cadillac CT6 complaints by model year
Best CT6 years: 2018. Years to avoid: 2019. Compare all years →
2017 Cadillac CT6 recalls (1)
Exterior lighting › Headlights
General Motors, LLC (GM) is recalling certain 2016-2017 Cadillac CT6 vehicles. The Park/Position lights may be excessively bright. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
Remedy: Dealers will install right and left side in-line headlight jumper harnesses, free of charge. Owner notification letters were mailed November 3, 2021. Owners may contact Cadillac customer service at 1-800-458-8006.
What 2017 Cadillac CT6 owners say
Transmission & drivetrain
The contact owns a 2017 Cadillac CT6. The contact stated that while driving at various speeds, the vehicle would hesitate upon depression of the accelerator pedal without warning. The contact had taken the vehicle to a dealer where they initially changed the transmission fluid and reprogrammed the transmission module; however, the failure persisted. The contact returned the vehicle to the dealer and she was informed that the torque converter was defective; but that the cost to replace the transmission was expensive. She was advised to bring the vehicle back to dealer each time the hesitation occurred to have the transmission fluid replaced. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 14,000.
While driving the vehicle with auto stop engaged, the auto stop was malfunctioning. When I get to a red light or stop sign vehicle would engage auto stop, once I let my feet off the gas pedal and accelerate, the vehicle would jerk out of gear then slip /drag then engage with a loud hit as if someone rear-ended me. The problem was duplicated and confirmed by the dealership. There has been no outside inspection other than the dealership. No warning lights messages prior to failure. In addition, the Auto-stop working with a week of this complaint shortly therafter.
Electrical system
The contact owns a 2017 Cadillac CT6. The contact stated that while driving at various speeds, the vehicle would hesitate upon depression of the accelerator pedal without warning. The contact had taken the vehicle to a dealer where they initially changed the transmission fluid and reprogrammed the transmission module; however, the failure persisted. The contact returned the vehicle to the dealer and she was informed that the torque converter was defective; but that the cost to replace the transmission was expensive. She was advised to bring the vehicle back to dealer each time the hesitation occurred to have the transmission fluid replaced. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 14,000.
These vehicles have an issue tbat GM is aware of, with their 8 speed automatic transmissions which are used in multiple GM vehicles and these cause safety issues because for instance my vehicle switches gears randomly almost causing a wreck, and shuttering, and even slipping and when this happens the cars traction control light is engaged shutting it off, active steering is also shut off due to these on going issues. Im in a cadillac group and hundreds of us have similar issues.
2017 Cadillac CT6 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.0L 4-cyl turbo plug-in hybrid | CVT | RWD | 23 / 29 / 26 |
| 2.0L 4-cyl turbo | 8-speed automatic | RWD | 22 / 30 / 25 |
| 3.6L 6-cyl | 8-speed automatic | AWD | 18 / 27 / 21 |
| 3.0L 6-cyl turbo | 8-speed automatic | AWD | 18 / 26 / 21 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2017 Cadillac CT6 a good car?
There isn't enough complaint history for the CT6 to compare model years reliably. So far owners have filed 17 complaints with NHTSA.
What is the most common problem with the 2017 Cadillac CT6?
The transmission & drivetrain — 10 complaints, 59% of all complaints for this model year. Next are the electrical system (4) and brakes (2).
How many recalls does the 2017 Cadillac CT6 have?
There is 1 recall for the 2017 Cadillac CT6, the most recent from September 29, 2021 (headlights). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Cadillac CT6?
The best years by complaints, compared at the same age, are 2018. Years to avoid or approach with caution: 2019. See the full Cadillac CT6 years comparison.
At what mileage do 2017 Cadillac CT6 problems happen?
The median mileage reported in complaints is about 14,000 miles; 75% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.