2020 Cadillac CT6 Transmission and drivetrain Problems
- Complaints
- 6about this part
- Share
- 55%of 11 total for the year
- Median mileage
- 81,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the transmission and drivetrain of the 2020 Cadillac CT6, 55% of the 11 complaints for this model year. Where a mileage was given, the median is 81,000 miles. 1 recall campaign on record is filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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 miles“The contact owns a 2020 Cadillac CT6. The contact stated while driving 65 MPH, the transmission seized, and the vehicle was coasted over to the right side of the roadway while waiting for tow service. A dealer as contacted. The vehicle was towed to the dealer where it was diagnosed with transmission failure. The vehicle was not repaired. The manufacturer informed the contact that the vehicle was out of warranty. The contact related the failure to NHTSA Campaign Number: 25V148000 (POWER TRAIN); however, the part to do the recall repair was not yet available. …”
NHTSA complaint #11673799, filed 2025-07, 98,000 miles“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 manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.”
NHTSA complaint #11654171, filed 2025-04“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 while his wife was driving at an undisclosed speed, the vehicle jerked before slamming into gear. No warning lights were illuminated. In addition, the contact stated that the transmission was shifting rough. The vehicle was taken to the dealer; however, the vehicle was not diagnosed or repaired. …”
NHTSA complaint #11667446, filed 2025-06Related recalls
- 25V148000Mar 6, 2025General 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…Covers: Cadillac CT6 2019–2020, Chevrolet Camaro 2020–2022, Cadillac CT5 2020–2021 +1 more
Related service bulletins
- 11018568May 27, 2025Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause…
- 11018535May 22, 2025Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause…
- 11019516Apr 17, 2025This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- 11015336Mar 7, 2025Certain vehicles listed above, may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause…
- 11013069Jan 9, 2025This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11011993Nov 27, 2024This service bulletin provides repair information to correct customer concerns of Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC) when…
- 11011989Nov 27, 2024This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
- 11011205Oct 28, 2024This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
- 11009463Sep 25, 2024This service bulletin provides repair information to correct customer concerns of Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC)…
- 11009756Sep 17, 2024This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and…
Transmission and drivetrain: other model years
Other parts of the 2020 Cadillac CT6
3 complaintsForward collision avoidance
2 complaintsOther or unknown
1 complaintsBody and structure
1 complaintsSuspension
1 complaintsWheels
1 complaints
← All problems reported for the 2020 Cadillac CT6
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology