This page covers 4 recalls and EPA fuel economy for the 2021 Cadillac CT4.
24–27 mpg combined
8.7–9.8 L/100km
Compact 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.
The 2021 Cadillac CT4 has 4 recalls, the most serious involving the 10-speed automatic transmission, which can suffer internal damage and cause the wheels to lock up while driving.
Two recalls involve the airbag system. The roof rail side-curtain airbags may have been installed incorrectly and can fail to deploy properly in a crash, reducing protection for occupants. A separate issue with the communications gateway module causes the airbag warning light to behave inconsistently, meaning it may not alert the driver when something is actually wrong with the airbag system. There is also a lighting issue where the daytime running lights may stay on when the headlights are activated, creating glare for oncoming drivers.
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.
We may earn a commission for purchases made through these links.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The daytime running lights stay on when the headlights are turned on, instead of turning off as required.
What the fix does
A dealer will update the body control module software, or the update will be sent remotely to your vehicle, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The roof rail side-curtain air bags may not have been installed correctly, which could cause improper deployment during a crash.
What the fix does
Dealers will inspect both roof rail air bags and reinstall them as needed at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The communications gateway module doesn't properly handle lost connection with the sensing diagnostic module, causing the air bag warning light to turn on and off unpredictably.
What the fix does
A dealer will update the communications gateway module software for free, or the update will be sent to your vehicle wirelessly.
Summarized — see the official notice for exact wording, dates, and contacts.
