Complaints by model year
| Year | Complaints | vs. typical* | Recalls | Top problem | Verdict |
|---|---|---|---|---|---|
| 2020 | 11 | 1.5× | 2 | Transmission | Average |
| 2019 | 17 | 2.4× | 4 | Transmission | Caution |
| 2018 | 9 | −28% | — | Engine | Average |
| 2017 | 17 | — | 1 | Transmission | Limited data |
| 2016 | 11 | — | 3 | Transmission | Limited data |
* Complaints compared with the median CT6 year at the same age, so new and old years are judged fairly. How this works.
Most common Cadillac CT6 problems
Latest Cadillac CT6 recalls
Power train › Automatic transmission
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.
Remedy: Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025.
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.
Service brakes
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.
Remedy: GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began February 4, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020, Cadillac customer service at…
Tires › Pressure monitoring and regulating 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…
Remedy: GM will notify owners, and dealers will replace all four TPMS sensors with the correct sensors, free of charge. The recall began December 3, 2019. Owners may contact GM customer service at 1-586-596-1733.
Exterior lighting › Turn signal › Switch
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."
Remedy: GM has notified owners, and dealers will replace the turn-signal switch. The recall began March 11, 2019. Owners may contact Cadillac customer service at 1-800-458-8006. The Cadillac number for this recall is N182207090.
Frequently asked questions
What years of the Cadillac CT6 should you avoid?
2019 — this year has the most complaints relative to other CT6 years at the same age, led by transmission & drivetrain problems in the 2019.
What is the best year for the Cadillac CT6?
2018 has the fewest complaints compared with other CT6 years at the same age. Newer years can look better simply because fewer complaints have come in yet, so we compare like with like.
What are the most common Cadillac CT6 problems?
Across all years, owners report the most problems with the transmission & drivetrain (39), brakes (8) and engine & cooling (6). Transmission complaints peak in the 2019 model year.
How many recalls has the Cadillac CT6 had?
8 recalls across 2016–2020. The model year with the most is 2019. See all Cadillac CT6 recalls by year.
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.