Most common 2020 Cadillac CT4 problems
Share of the 8 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Cadillac CT4 complaints by model year
2020 Cadillac CT4 recalls (4)
Power train › Automatic transmission
General Motors LLC (GM) is recalling certain 2019-2020 Cadillac CT6, 2020-2021 CT4, CT5, and 2020-2022 Chevrolet Camaro vehicles equipped with a 10-speed transmission. The transmission may become damaged internally and cause the wheels to lock-up.
Remedy: Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025.
Exterior lighting › Lighting control module › Software
General Motors, LLC (GM) is recalling certain 2020-2023 Cadillac CT4 and CT5; 2021-2023 Buick Envision; and 2022-2023 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles. The daytime running lights (DRLs) may not deactivate when the headlights are on.
Remedy: The body control module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed January 23, 2023.
Air bags › Side/window › Curtain
General Motors, LLC. (GM) is recalling certain 2020-2022 Cadillac CT4 and CT5 vehicles. The roof rail side-curtain air bags may not have been installed correctly, which could result in an improper air bag deployment during a crash.
Remedy: Dealers will inspect both left and right-side roof rail air bags and reinstall the air bags, as necessary, free of charge. Owner notification letters were mailed on August 30, 2021.
Service brakes
General Motors LLC (GM) is recalling certain 2020 Chevrolet Corvette and Cadillac CT4, CT5 and XT4, 2021 Chevrolet Trailblazer, and 2020-2021 Buick Encore GX vehicles. Sensor connection contamination in the electronic brake boost system may cause an interruption of communication between the sensor and the brake boost system.
Remedy: GM will notify owners, and dealers will replace the electronic brake boost module, free of charge. The recall began December 9, 2020.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2020 Cadillac CT4:
Air Bag Malfunction
On April 9, 2021, the Office of Defects Investigations (ODI) opened PE21-010 to investigate instances of air bag malfunction indicator light (MIL) illumination and potential for frontal air bag non-deployment in several vehicles manufactured by General Motors (GM).
What 2020 Cadillac CT4 owners say
Engine & cooling
The contact owns a 2020 Cadillac CT4. The contact stated while driving 70 MPH, on several occasions, the vehicle failed to accelerate, hesitated, and then stalled. The vehicle was towed on three occasions to the local dealer, who was unable to determine the cause of the failure. There were no DTC codes retrieved. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 45,000.
69,000 mile oil change I was told i needed to spend thousands of dollars on repairing an oil leak b/c my Cam carrier is leaking. Cadillac has a know issue with this repair and refuses to stand behind it's product. Numerous complaints already on forums and yet they charge thousands to fix. A top name brand that can't produce a vehicle past 69000 miles without a major issue. I wanted to make it known about the ongoing issue by Cadillac. So sad.
2020 Cadillac CT4 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.0L 4-cyl turbo | 8-speed automatic | RWD | 23 / 34 / 27 |
| 2.0L 4-cyl turbo | 8-speed automatic | AWD | 23 / 32 / 26 |
| 2.7L 4-cyl turbo | 10-speed automatic | RWD | 20 / 30 / 24 |
| 2.7L 4-cyl turbo | 10-speed automatic | AWD | 20 / 28 / 23 |
EPA ratings. Class: Compact car.
Frequently asked questions
Is the 2020 Cadillac CT4 a good car?
That is a low number of complaints for a car on sale this long. So far owners have filed 8 complaints with NHTSA.
What is the most common problem with the 2020 Cadillac CT4?
The engine & cooling — 3 complaints, 38% of all complaints for this model year. Next are the transmission & drivetrain (2) and brakes (2).
How many recalls does the 2020 Cadillac CT4 have?
There are 4 recalls for the 2020 Cadillac CT4, the most recent from March 6, 2025 (automatic transmission). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
At what mileage do 2020 Cadillac CT4 problems happen?
The median mileage reported in complaints is about 45,000 miles; 100% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.