CT6 (1st)
Data covers 4 NHTSA model names
Reliability Score
Complaints by Engine Code
LGX - DI: Direct Injection, VVT, ALUM, GEN 2
3.6L 6-cylView details
Complaint Breakdown
3.0TT
3.0L 6-cyl TurboView details
Complaint Breakdown
Show 3 additional engine variants with limited data
2.0T
2.0L 4-cyl TurboView details
Complaint Breakdown
LTA
4.2L 8-cyl TurboView details
Complaint Breakdown
Cadillac CT6 Unidentified Engine
View details
Complaint Breakdown
Owner Complaints by System
Complaints owners filed with NHTSA about the Cadillac CT6, counted across every engine. A complaint can name more than one system.
What to check on a used 2016-2020 Cadillac CT6
On a used 2016-2020 Cadillac CT6, the systems with the most NHTSA owner complaints are the transmission and drivetrain (47), the electrical system (8) and the engine (8). Each one has an inspection step below, with counts as of 2026-10-12. A complaint is an owner report, not a confirmed defect, and counts rise with sales.
- Accelerate gently through every gear, then once at full throttle. Shift into Reverse and back to Drive.Costly repair. NHTSA has 47 owner complaints on the 2016-2020 Cadillac CT6 about the transmission and drivetrain, all engines combined.
- Switch on every electrical item in turn: lights, windows, locks, wipers, climate fan, screen and power outlets.Costly repair. NHTSA has 8 owner complaints on the 2016-2020 Cadillac CT6 about the electrical system.
- Start the engine cold and listen for the first 30 seconds, then again at idle once it is warm.Costly repair. NHTSA has 8 owner complaints on the 2016-2020 Cadillac CT6 about the engine, all engines combined.
- On an empty road, brake firmly from 40 mph with a light grip on the wheel.Safety. NHTSA has 8 owner complaints on the 2016-2020 Cadillac CT6 about the brakes.
- Switch the ignition on and watch the airbag light. On the drive, check the backup camera and any collision or lane warning.Safety. NHTSA has 7 owner complaints on the 2016-2020 Cadillac CT6 about the airbags and driver-assist systems.
Recalls (8)
General Motors LLC (GM) is recalling certain 2019-2020 Cadillac CT6, 2020-2021 CT4, CT5, and 2020-2022 Chevrolet Camaro vehicles equipped with a 10-speed transmission. The transmission may become damaged internally and cause the wheels to lock-up.
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."
General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500, Cadillac CT6, and GMC Sierra 1500 vehicles. Due to an Electronic Brake Control Module (EBCM) software error, the vehicle's Electronic Stability Control (ESC) and Antilock Brake System (ABS) may become disabled. Furthermore, if this specific error occurs, the vehicle's diagnostics will not illuminate the instrument cluster ESC and ABS malfunction warning lights. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control" and 135, "Light Vehicle Brake Systems."
General Motors LLC (GM) is recalling certain 2020 Cadillac CT6 vehicles equipped with dealer-installed accessory 20" x 8.50" wheels (RPO 5JO or SHH). The tire pressure monitoring system (TPMS) sensors use the incorrect wireless radio frequency and cannot illuminate the low pressure warning light when the tire pressure drops below the recommended level. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 138, "Tire Pressure Monitoring Systems."
General Motors LLC (GM) is recalling certain 2019 Cadillac CT6 vehicles. Rotation of the steering wheel will not automatically cancel the turn-signals from flashing. As such, these vehicles fail to comply with Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices and Associated Equipment."
Show 3 older recalls
General Motors LLC (GM) is recalling certain 2018-2019 Cadillac CT6, Escalade ESV, Chevrolet Suburban, Volt, and GMC Yukon XL vehicles. Certain second-row or third-row rear seatbelts retractor assemblies may not automatically lock when the seatbelt is fully pulled out of the retractor, possibly preventing a child seat from being properly secured. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection."
General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CT6 vehicles. The inboard child seat anchorage bars may have had excess structural adhesive applied during assembly, which can interfere with the installation of a child seat. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
General Motors LLC (GM) is recalling certain model year 2016 Cadillac CT6 vehicles manufactured July 21, 2016, to July 22, 2016. The bolt that connects the front passenger seat belt webbing to the seat's anchor plate may be missing. Without the bolt, the seat belt webbing may detach from the seat anchor.
Alternatives in Full-Size Sedan
Frequently Asked Questions
What are the most common 2016-2020 Cadillac CT6 complaints?
Owners have filed 77 complaints with NHTSA about the 2016-2020 Cadillac CT6. The systems they name most often are the transmission, the electrical system and the engine.
Is the 2016-2020 Cadillac CT6 a good used car?
That depends on the model year, the mileage and the maintenance history of the car in front of you. Owners have filed 77 complaints with NHTSA about the 2016-2020 Cadillac CT6. Check which systems they name most often and whether a recall is still open on that car.
How many NHTSA complaints does the 2016-2020 Cadillac CT6 have?
NHTSA has 77 owner complaints on file for the 2016-2020 Cadillac CT6 as of the latest data pull. A complaint is an owner's report, not a confirmed defect, and counts rise with sales.
What recalls affect the 2016-2020 Cadillac CT6?
NHTSA lists 8 recalls covering some 2016-2020 Cadillac CT6 vehicles. Which ones apply depends on the VIN: enter it at nhtsa.gov/recalls to see the open campaigns on a specific car.
What should I check before buying a used Cadillac CT6?
Run the VIN through NHTSA's recall lookup and confirm every open recall has been done. Look hardest at the transmission, the electrical system and the engine, the systems owners complain about most. Ask for maintenance records, have an independent mechanic inspect the car and run a vehicle history report for prior accidents and title issues.
Does the CT6 have NHTSA crash test ratings?
NHTSA has not published crash test ratings for the 2016-2020 Cadillac CT6. Not all vehicles are tested each year. For the latest NHTSA safety information, visit nhtsa.gov/ratings.
Data from NHTSA federal complaints database. 77 complaints analyzed. Data confidence: moderate. Last updated: 2026-10-12.