Cadillac CT6 reliability: common problems by model year
Across 4 model years, the Cadillac CT6 has 64 owner-filed NHTSA complaints and 11 recalls on record. The most-reported areas are power train and service brakes. 2020 drew the most complaints (20), 2016 the fewest (11).
4
Model years tracked
64
Owner complaints
11
Recalls
18
Median per year
Source: NHTSA complaints and recalls filed for Cadillac CT6 vehicles (US, public record). Typical used asking price $20,774–$29,499.
Which CT6 years have the most problems?
Complaint volume by model year. Raw NHTSA totals, not adjusted for sales volume or time on the road, so older and higher-selling years accumulate more. Every year links to its full breakdown.
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.