2020 Cadillac CT6: common problems and reliability

The 2020 Cadillac CT6 has 20 owner-filed NHTSA complaints and 2 recalls on record. The most-reported areas are power train and service brakes. Owners most often flag unreliable electronics and poor build quality — electronics stop working randomly all over the car. frequency: very frequent.

Safety record for the 2020 model year

20
Owner complaints
2
Recalls
4
Crash reports
0
Fire reports

Source: NHTSA complaints and recalls filed for 2020 Cadillac CT6 vehicles (US, public record).

Where owners report problems

power train
10
service brakes
6
forward collision avoidance
4
structure
2
suspension
2

Recalls affecting the 2020 CT6

tires:pressure monitoring and regulating systems

Campaign 19V731000

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 w…

power train:automatic transmission

Campaign 25V148000

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 c…

What owners say across generations

Mixed sentiment with a clear divide between appreciation for the vehicle's core attributes and significant concerns over reliability and long-term viability. The CT6 is widely praised for its driving dynamics, particularly on the advanced Omega platform, which

  • Unreliable electronics and poor build quality — electronics stop working randomly all over the car. Frequency: very frequent.
  • Problematic 8-speed automatic transmission (8L45 and 8L90) — harsh shifting, jerkiness, especially in 2nd gear, laggy response, subject to class action lawsuits. Frequency: very frequent.
  • Severe engine cooling issues (CT6-V 4.2L Twin-Turbo V8) — engines can burst into flames after hard driving, leading to parking outside as a precaution; described as a fundamental design flaw. Frequency: very frequent.
  • Parts availability and cost — many parts are exclusive to the CT6, making them hard to source and very expensive, a major concern for long-term ownership. Frequency: very frequent.
  • CUE infotainment system — complicated menu layout, sluggish response, noticeable lag, screen freezes, requires costly replacements. Frequency: recurrent.

Owner insights cover all generations of the CT6.

Typical used price

Used CT6 listings typically run $20,774–$29,499 across 2016 to 2020 model years.

Other CT6 model years

2019 CT62018 CT62016 CT6
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