2020 Cadillac CT6 Problems
- Complaints
- 11filed with NHTSA
- Median mileage
- 12,100miles, 6 complaints with mileage
- Recalls
- 2campaigns on record
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
- NHTSA crash rating
- —no overall rating published
- EPA fuel economy
- 21 mpgcombined, 3.6L 6-cyl AWD · 18 city / 27 hwy
Sources: NHTSA records for the 2020 Cadillac CT6 (complaints, recalls, investigations), EPA fuel economy. Report an error
NHTSA recorded 11 consumer complaints for the 2020 Cadillac CT6. The part named most often is transmission and drivetrain, with 6 complaints (55% of the total), followed by brakes (3) and forward collision avoidance (2). 6 of the complaints include a mileage, and 67% of those were filed for vehicles with under 50,000 miles; the median is 12,100 miles. Of all complaints, 1 involved a crash, according to the filers. NHTSA lists 2 recall campaigns and 753 technical service bulletins for this model year. Transmission and drivetrain complaints overlap with 1 recall campaign and 79 technical service bulletins filed under the same part. Brakes complaints overlap with 32 technical service bulletins filed under the same part.
This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.
Which parts are reported most
Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.
- Brakes3 27%
- Other or unknown1 9.1%
- Body and structure1 9.1%
- Suspension1 9.1%
- Wheels1 9.1%
Example complaints
Transmission and drivetrain: “The contact owns a 2020 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that the transmission was shifting hard. The dealer was contacted. The manufacturer was not made aware of the issue. The failure mileage was approximately 64,000. VIN tool confirms parts not available.”
NHTSA complaint #11666008, filed 2025-06, 64,000 milesBrakes: “On friday, november 13, 2020 I was stopped at a stoplight in marysville, ohio. It appeared that traffic started to move, so I took my foot off the brake. Almost immediately the emergency braking feature engaged. While this tends to startle you because it is so abrupt, almost like a head-on collision, I pressed on the brake. The brake did not stop the car. It was similar to when anti-lock braking is engaged. The brakes felt like they were pulsating, so the car continued to move forward until it pressed up against the car in front of me. …”
NHTSA complaint #11374732, filed 2020-11, 15,300 milesForward collision avoidance: “The super cruise self driving feature doesn't work and error messages continuously flash on dashboard. It has been at the dealer since 12/16 (>9 weeks) without any resolution. Calls, emails, posts to Cadillac and general motors go unanswered. Dealer tells me Cadillac engineers from corporate come and go with no solution. I've made 2 payments to date without my car. I notified GM financial I will no longer make payments on a car I do not have. Also no response.”
NHTSA complaint #11396890, filed 2021-02, 8,900 milesMileage when problems were reported
67% of the 6 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 900 and 64,000 miles.
Complaints by year filed
Fewer than 15 complaints, too few for a reliable trend.
Fuel economy and running cost
EPA ratings for each 2020 Cadillac CT6 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).
| Version | Engine | Transmission | City | Hwy | Comb. | Fuel / yr |
|---|---|---|---|---|---|---|
| CT6 AWD | 3.6L 6-cyl | 10-speed automatic | 18 | 27 | 21 | $3,200 |
| CT6 AWD | 4.2L 8-cyl | 10-speed automatic | 14 | 25 | 17 | $4,850 |
Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.
Recalls and investigations
- 25V148000Mar 6, 2025Power train › Automatic transmissionCovers: Cadillac CT6 2019–2020, Chevrolet Camaro 2020–2022, Cadillac CT5 2020–2021 +1 more
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.
- 19V731000Oct 15, 2019Tires › Pressure monitoring and regulating systemsCovers: Cadillac CT6 2020
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…
Recall details for the 2020 Cadillac CT6 → · Check a VIN at nhtsa.gov/recalls
Technical service bulletins
TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 753 on record; the latest 10 are shown.
- 11037555Sep 26, 2026Other or unknown. This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- 11037253Sep 4, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11035340Jul 21, 2026Other or unknown. PI to help diagnose A/C concern
- 11030974Apr 1, 2026Other or unknown. This preliminary information communicates information about how to determine if a wheel and tires size change is available.
- 11030092Mar 9, 2026Other or unknown. This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- 11030091Mar 9, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11029950Mar 2, 2026Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
- 11027697Jan 16, 2026Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
- 11027701Jan 14, 2026Other or unknown. This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
- 11027601Jan 8, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
Other model years of the Cadillac CT6
| Year | Complaints | Median mi | Recalls | Crash ★ | MPG | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|---|
| 2020 | 11 | 12,100 | 2 | — | 21 | — | Not enough data |
| 2019 | 17 | 58,000 | 4 | — | 28 | — | Rising |
| 2018 | 9 | 28,750 | 0 | — | 25 | — | Not enough data |
| 2017 | 17 | 10,000 | 1 | — | 25 | — | Stable |
| 2016 | 11 | 16,500 | 3 | — | 25 | — | Not enough data |
Frequently asked questions
How many NHTSA complaints does the 2020 Cadillac CT6 have?
NHTSA recorded 11 consumer complaints for the 2020 Cadillac CT6 as of Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 2020 Cadillac CT6 is reported most often?
Transmission and drivetrain is named most often, in 6 complaints (55% of the total), followed by brakes with 3.
Has the 2020 Cadillac CT6 been recalled?
NHTSA lists 2 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.
What gas mileage does the 2020 Cadillac CT6 get?
The EPA rates the 2020 Cadillac CT6 (CT6 AWD, 3.6L 6-cyl) at 21 mpg combined, 18 city and 27 highway, with an estimated annual fuel cost of $3,200 at 15,000 miles a year. Other engine and drive versions are rated differently.
At what mileage are problems with the 2020 Cadillac CT6 reported?
Among the 6 complaints that include a mileage, the median is 12,100 miles and the middle half falls between 900 and 64,000 miles; 67% were filed for vehicles with under 50,000 miles.
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).
Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.