2017 Cadillac CT6 Plug-In Hybrid Engine Problems
- Complaints
- 1about this part
- Share
- 11%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 1 complaints about the engine of the 2017 Cadillac CT6 Plug-In Hybrid, 11% 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.
“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 milesRelated service bulletins
- 11026017Jun 5, 2025This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- 10164748Aug 7, 2019This Preliminary Information communication provides information to the technician for the adaptive cruise control or lane keep assist unavailable message in the driver?s…
- 10163266Jun 25, 2019This informational bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 10161941May 29, 2019This technical bulletin provides a procedure to change the oil if excessive fuel has been found in the oil and the cause of the DTC set. Also replacing the PCV valve in camshaft…
- 10160987May 7, 2019This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the…
- 10160983May 6, 2019This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller…
- 10160690Apr 24, 2019This Preliminary information communicates to the dealer an issue where the vehicle's engine may crank over unprompted and not start afterward. This is the result of hooking up…
- 10160113Apr 2, 2019This technical bulletin provides a procedure to replace the engine for vehicles that have the condition of Loud Noise, Malfunction Indicator Lamp Illuminated, and/or No Start…
- 10158819Mar 28, 2019This technical bulletin provides a procedure to change the oil if excessive fuel has been found in the oil and the cause of the DTC set. Also replacing the PCV valve in camshaft…
- 10158838Mar 1, 2019This informational bulletin provides information on a normal engine operating condition for faster emission warm up time.
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2017 | 1 | 11% |
Other parts of the 2017 Cadillac CT6 Plug-In Hybrid
7 complaintsElectrical system
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