2018 Cadillac CT6: common problems and reliability

The 2018 Cadillac CT6 has 18 owner-filed NHTSA complaints and 2 recalls on record. The most-reported areas are engine and steering. 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 2018 model year

18
Owner complaints
2
Recalls
0
Crash reports
0
Fire reports

Source: NHTSA complaints and recalls filed for 2018 Cadillac CT6 vehicles (US, public record).

Where owners report problems

engine
7
steering
6
power train
5
suspension
2
structure
2

Recalls affecting the 2018 CT6

seat belts:rear/other

Campaign 18V673000

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 automati…

seats:mid/rear assembly

Campaign 18V437000

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 installati…

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

2020 CT62019 CT62016 CT6
Full Cadillac CT6 owner reportCompare against another car