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 without warning while driving.
The roof rail side-curtain airbags may not have been installed correctly, which can cause them to deploy improperly in a crash and reduce the protection they provide to occupants. There is also a software issue in the communications gateway module that causes it to misread the airbag diagnostic system, which can result in the airbag warning light either flickering on when nothing is wrong or failing to light up when a real fault exists. That means a driver may have no reliable indication of whether the airbag system is actually functioning. On the exterior lighting side, a software fault in the lighting control module can prevent the daytime running lights from switching off when the headlights turn on, leaving both active at the same time and creating glare that reduces visibility for other 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.
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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.
