2020 Cadillac CT6
The Verdict
Worst problem area
Transmission & Drivetrain
Transmission & Drivetrain leads by volume: 6 of 11 complaints (55%) mention it.
Complaints filed fell from 16 in 2019 to 11 in 2020.
Data last changed . Sources: NHTSA complaints and recalls, EPA fuel economy data. Methodology
Cost, Fuel Economy & Complaint History
| Category | 2018 | 2019 | 2020 | vs. 2020 Large Cars |
|---|---|---|---|---|
| Annual fuel cost ($) | 2,950–3,700 | 2,750–4,550 | 2,950–4,550 | |
| Combined MPG | 21–25 | 17–28 | 17–21 | |
| City / Highway MPG | 18–23 / 26–30 | 14–24 / 25–34 | 14–18 / 25–27 | |
| CO₂ tailpipe (g/mi) | 360–424 | 317–521 | 420–521 | |
| Complaints filed | 9 | 16 | 11 | |
| Recalls issued | 0 | 4 | 2 | |
| Crash-involved complaints | 0 | 0 | 1 | |
| Fire-involved complaints | 0 | 0 | 0 | |
| Injuries reported | 0 | 0 | 0 | |
| Deaths reported | 0 | 0 | 0 | |
| Configurations compared | 3 | 4 | 2 |
Not compared: this database has no vehicle sales or registration figures, so a raw count mostly reflects how many were sold, not how safe the vehicle is.
Common questions
How many recalls does the 2020 Cadillac CT6 have?
2 NHTSA recall campaigns as of Sep 16, 2026. Check your VIN with NHTSA to see whether one applies to your car.
What is the most common complaint about the 2020 Cadillac CT6?
Transmission & Drivetrain: 6 of 11 NHTSA complaints (55%) mention it.
What gas mileage does the 2020 Cadillac CT6 get?
EPA rates it 17–21 MPG combined across 2 configurations.
How much does it cost to fuel a 2020 Cadillac CT6?
EPA estimates $2,950–$4,550 a year in fuel costs, using EPA's assumptions.
Similar Vehicles
EPA-Rated Configurations (2)
| Configuration | Transmission | Cylinders | Displacement | Drivetrain | Fuel Type | Vehicle Class | City | Highway | Combined | Annual Fuel Cost | CO₂ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Configuration 1 | Automatic (S10) | 6 | 3.6L | All-Wheel Drive | Regular | Large Cars | 18 mpg (high) | 27 mpg (high) | 21 mpg (high) | $2,950 (low) | 420 g/mi (low) |
| Configuration 2 | Automatic (S10) | 8 | 4.2L | All-Wheel Drive | Premium | Large Cars | 14 mpg (low) | 25 mpg (low) | 17 mpg (low) | $4,550 (high) | 521 g/mi (high) |
Complaints by Category
| Category | Complaints | Crash-Involved | Fire-Involved | Injuries | Deaths |
|---|---|---|---|---|---|
| Engine | 0 | 0 | 0 | 0 | 0 |
| Transmission & Drivetrain | 6 | 0 | 0 | 0 | 0 |
| Fuel System | 0 | 0 | 0 | 0 | 0 |
| Electrical | 0 | 0 | 0 | 0 | 0 |
| Brakes | 3 | 1 | 0 | 0 | 0 |
| Steering | 0 | 0 | 0 | 0 | 0 |
| Suspension, Wheels & Tires | 2 | 0 | 0 | 0 | 0 |
| Airbags & Restraints | 0 | 0 | 0 | 0 | 0 |
| Driver Assistance & Speed Control | 2 | 1 | 0 | 0 | 0 |
| Body, Seats & Latches | 1 | 0 | 0 | 0 | 0 |
| Visibility & Lighting | 0 | 0 | 0 | 0 | 0 |
| Other | 1 | 0 | 0 | 0 | 0 |
A complaint that names more than one category is counted in each, so the rows can add up to more than the total number of complaints.
Recalls (2)
POWER TRAIN:AUTOMATIC TRANSMISSION · Campaign 25V148000 · Mar 6, 2025
Defect: 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.
Consequence: Wheel lock-up while driving increases the risk of a crash.
Remedy: Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025. Owners may contact Cadillac customer service at 1-800-333-4223 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242480630.
TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS · Campaign 19V731000 · Oct 15, 2019
Defect: General Motors LLC (GM) is recalling certain 2020 Cadillac CT6 vehicles equipped with dealer-installed accessory 20" x 8.50" 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."
Consequence: 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.
Remedy: 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. Owners may contact GM customer service at 1-586-596-1733. GM's number for this recall is N192279200.