This page covers 2 recalls, 11 owner complaints and EPA fuel economy for the 2020 Cadillac CT6.
17–21 mpg combined
11.2–13.8 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 2 tested variants for this model year.
Powertrain complaints dominate what 2020 CT6 owners report, and the pattern centers squarely on the transmission. Owners frequently describe harsh or abrupt shifting, a sudden jerk before the transmission engages a gear, and in at least one case a complete transmission seizure at highway speed that left the vehicle unable to continue under its own power. These episodes reportedly occur without any warning lights appearing on the dash beforehand. A smaller cluster of complaints involves the forward collision avoidance system, where owners report the system behaving unexpectedly, though that group is thin enough that no tight symptom pattern emerges from it. The transmission complaints, by contrast, consistently describe the hard-shift and slam-into-gear behavior across multiple owners and driving conditions.
11
Total Complaints
1
Crash-Related
By System
The 2020 Cadillac CT6 has two recalls, the more serious being a 10-speed transmission that can suffer internal damage and cause the wheels to lock up while driving, raising the risk of a crash.
The second recall affects only vehicles fitted with dealer-installed accessory 20-inch wheels: the tire pressure monitoring sensors operate on the wrong wireless frequency and cannot trigger the low-pressure warning light, so a driver may unknowingly continue driving on underinflated tires, which can affect handling and increase crash risk.
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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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 →
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The tire pressure monitoring sensors on certain 20-inch wheels use an incorrect wireless frequency and cannot trigger the low pressure warning light when tire pressure drops below the recommended level.
What the fix does
Dealers will replace all four tire pressure monitoring sensors with correct sensors at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
