2017 Cadillac CT6 Plug-In Hybrid Transmission and drivetrain Problems
- Complaints
- 7about this part
- Share
- 78%of 9 total for the year
- Median mileage
- 9,759miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 7 complaints about the transmission and drivetrain of the 2017 Cadillac CT6 Plug-In Hybrid, 78% of the 9 complaints for this model year. Where a mileage was given, the median is 9,759 miles.
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.
“I purchased the used 2017 Cadillac ct6 in march 2019 with 24,192 miles. It was a certified pre -owned car by the dealer. Additionally I purchased a cpo protection plus protection plan with the car. I am experiencing problems with the transmission. During acceleration and decelerating the car feels a hesitation followed by a significant shake, shudder, jerk, clunk or hard shift. The auto start stop feature is not working correctly. …”
NHTSA complaint #11255505, filed 2019-09, 24,192 miles“I have had issues with my vehicle that involves hard shifting at times and also, the vehicle sometimes will lurch quite abruptly. It actually feels as if the vehicle was rear ended. I have taken the vehicle to the dealership on 4 occasions and they were only able to replicate the problem one time. This hard shift/lurching occurs usually when at a stand still and, once you remove your foot from the brake, vehicle may shift hard. It doesn't matte where I am; whether on streets or on the freeway. If vehicle is stopped, then this happens on occasion. …”
NHTSA complaint #11063627, filed 2018-01, 7,964 miles“Transmission has a signification clunk/hesitation/delay shifting up from 1st-2nd gear and down from 2nd-1st gear. In the upshift, the car violently lunges forward once the acceleration rev from the push of the pedal catches up with the gear shifting, no matter how delicately you might push the pedal. Feels like the vehicle has been hit from behind once it catches. …”
NHTSA complaint #11104282, filed 2018-06, 51,000 miles“On more than three occasions, this vehicle has lost substantial or all propulsion due to engineering design defects with the gas/hybrid electric transmission system. All but one of these situations occurred on a high speed freeway causing potentially life threatening conditions when the vehicle substantially slowed or stopped. This is a known issue as is evidenced by other owners of this vehicle reporting the same issue and the manufacturer failing to have a viable permanent remedy. …”
NHTSA complaint #11316043, filed 2020-03, 9,759 miles“Hard shifts in low speeds, intense vibration , shudder throughout driving speed. Cadillac dealer said it is torgue converter issue, car transmission needs to be fluid exchanged for $800.”
NHTSA complaint #11246532, filed 2019-08, 83,000 milesRelated service bulletins
- 10165123Aug 12, 2019This informational bulletin provides information on Some vehicles may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be…
- 10165135Aug 6, 2019This engineering information bulletin is requesting information from the field to validate a field fix. Before contacting engineers, remove the transmission oil pan and inspect…
- 10165435Aug 1, 2019N192217820 - Service Update Bulletin. The current transmission fluid may cause the customer to experience a shake or shudder feeling, which may be described as driving over…
- 10163890Jul 29, 2019This technical bulletin provides information for new transmission oil to use and a procedure for exchanging the old fluid and adding the new fluid to correct a shake/shudder…
- 10164120Jul 25, 2019This technical bulletin provides information for new transmission oil to use, a procedure for exchanging the old fluid and adding the new fluid to a service transmission.
- 10163248Jun 7, 2019This technical bulletin provides a procedure to rebuild the transmission and install a snap ring retainer to eliminate the 1-3 clutch spring ring from coming out of the ring…
- 10163215Jun 6, 2019This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC…
- 10161044May 23, 2019This Preliminary Information communication advises the technician on the steps to diagnose the intermittent noise of center bearing slinger and rubber bearing support. Technician…
- 10161881May 21, 2019This technical bulletin provides information for new transmission oil to use and a procedure for exchanging the old fluid and adding the new fluid to correct a shake/shudder…
- 10161968May 20, 2019This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2017 | 7 | 78% |
Other parts of the 2017 Cadillac CT6 Plug-In Hybrid
1 complaintsEngine
1 complaintsBody and structure
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2017 Cadillac CT6 Plug-In Hybrid
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