This page covers 5 recalls, 15 owner complaints and EPA fuel economy for the 2019 Cadillac CT6.
17–28 mpg combined
8.4–13.8 L/100km
Large Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 4 tested variants for this model year.
Powertrain complaints dominate what 2019 CT6 owners report, making up the bulk of the 15 filings on record. The most common theme is transmission behavior, owners describe shuddering at various speeds along with hard, abrupt shifts, typically without any warning light appearing on the dash. A separate but recurring concern involves the vehicle rolling backward a short distance after being parked and the driver has exited. One report describes a more dramatic event where the wheels appeared to lock up at highway speed and the car began swaying before decelerating, requiring a tow. Several owners note that dealers confirmed the needed parts were unavailable at the time of their visits. The remaining systems, brakes and wipers, each account for a single report and don't show a pattern.
15
Total Complaints
By System
Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
The 2019 Cadillac CT6 has 5 recalls, the most serious being a 10-speed automatic transmission defect where internal damage or a worn control valve can cause the wheels to lock up suddenly while driving, raising the risk of a crash.
On the braking side, a software error in the brake control module can disable both the anti-lock brakes and electronic stability control without warning, leaving the driver without those safety systems in a skid or emergency stop. There is also a seatbelt concern: certain rear seatbelt retractors may not lock when the belt is fully extended, which can prevent a child safety seat from being properly secured and increase the risk of injury in a crash. Rounding out the list, the turn signal stalk on some vehicles does not automatically cancel the signal after a turn is completed, meaning the indicator can keep flashing until the driver manually switches it off.
At a glance
What can fail
The 10-speed transmission may suffer internal damage that causes the wheels to lock up, preventing normal braking and steering.
What the fix does
Dealers will install updated transmission control module monitoring software at no cost to detect and prevent transmission damage.
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Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The transmission control valve may wear over time, losing pressure. This can cause harsh shifts and wheel lockup.
What the fix does
Dealership will update transmission control module software to detect valve wear early. If wear is found, a service light appears and the vehicle is limited to fifth gear.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A software error in the Electronic Brake Control Module can disable the Electronic Stability Control and Antilock Brake System. The warning lights for these systems may not turn on, leaving you unaware of the failure.
What the fix does
Dealers will reprogram the Electronic Brake Control Module at no charge to correct the software error and restore proper system function.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The turn-signal lights continue flashing after you rotate the steering wheel, instead of automatically canceling as they should.
What the fix does
The dealer will replace the turn-signal switch to restore automatic cancellation when the steering wheel is turned.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Second or third-row rear seatbelt retractors may not lock when fully pulled out, preventing child seats from being properly secured.
What the fix does
Dealers will inspect rear seatbelt retractors and replace them if needed, at no charge.
Summarized — see the official notice for exact wording, dates, and contacts.
