2020 Cadillac CT6: Recalls, Problems & MPG
Here are the deets on the 2020 Cadillac CT6: 2 recalls, 11 owner complaints and up to 21 mpg combined.
Recalls
2 vehicle recalls from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Tires Vehicle recall #19V731000 · 2019 · 81 vehicles
What's wrong: 50" wheels (rpo 5jo or shh). The tire pressure monitoring system (TPMS) sensors use the incorrect wireless radio frequency and cannot illuminate the low pressure warning light when the tire pressure drops below the recommended level. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (fmvss) number 138, "tire pressure monitoring systems."
Why it matters: Drivers May drive the vehicle with low tire pressure without a low tire pressure warning, negatively impacting the vehicle handling and increasing the risk of a crash.
The fix: Gm will notify owners, and dealers will replace all four TPMS sensors with the correct sensors, free of charge. The recall began December 3, 2019.
Transmission & drivetrain Vehicle recall #25V148000 · 2025 · 90,081 vehicles
What's wrong: The transmission May become damaged internally and cause the wheels to lock-up.
Why it matters: Wheel lock-up while driving increases the risk of a crash.
The fix: Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 0 mention a fire, 0 injuries and 0 deaths were reported.
What owners describe
- Transmission & drivetrain (6): the most common themes are hard / delayed shifting (3).
- Brakes (3): no single recurring theme in the descriptions.
- Forward collision avoidance (2): no single recurring theme in the descriptions.
- Suspension (1): no single recurring theme in the descriptions.
The 2020 Cadillac CT6 has 11 owner complaints, ranking #4 of 5 CT6 model years for complaints (about average; the typical year has 13). Complaints peaked in 2025 (7 filed that year). The typical problem showed up when the car was about 4 years old, at a median of 12,100 miles. Neighboring years: 2019 (17 complaints, 4 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 3.6 L 6-cyl | Automatic (S10) | All-Wheel Drive | 18 | 27 | 21 | Regular |
| 4.2 L 8-cyl turbo | Automatic (S10) | All-Wheel Drive | 14 | 25 | 17 | Premium |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2020 Cadillac CT6.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
From $19.99/mo · $59.99/yrStep-by-step photos written from a real teardown. Great for first-timers.
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FAQ
Does the 2020 Cadillac CT6 have any recalls?
Yes. NHTSA lists 2 vehicle recalls for the 2020 Cadillac CT6. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2020 Cadillac CT6 problems?
Owners have filed 11 complaints with NHTSA. The most-reported areas are transmission & drivetrain (6), brakes (3), forward collision avoidance (2).
What gas mileage does the 2020 Cadillac CT6 get?
EPA ratings run up to 21 mpg combined (3.6 L, Automatic (S10)), across 2 engine and transmission combos.
Where can I get a 2020 Cadillac CT6 repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.