2017 Cadillac CT6 Problems
- Complaints
- 17filed with NHTSA
- Median mileage
- 10,000miles, 4 complaints with mileage
- Recalls
- 1campaigns on record
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
- NHTSA crash rating
- —no overall rating published
- EPA fuel economy
- 25 mpgcombined, 2.0L 4-cyl RWD · 22 city / 30 hwy
Sources: NHTSA records for the 2017 Cadillac CT6 (complaints, recalls, investigations), EPA fuel economy. Report an error
NHTSA recorded 17 consumer complaints for the 2017 Cadillac CT6. The part named most often is transmission and drivetrain, with 10 complaints (59% of the total), followed by electrical system (4) and brakes (2). 4 of the complaints include a mileage, and 75% of those were filed for vehicles with under 50,000 miles; the median is 10,000 miles. NHTSA lists 1 recall campaign and 665 technical service bulletins for this model year. Transmission and drivetrain complaints overlap with 91 technical service bulletins filed under the same part. Electrical system complaints overlap with 113 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.
- Electrical system4 24%
- Brakes2 12%
- Engine1 5.9%
- Fuel system1 5.9%
- Other or unknown1 5.9%
- Steering1 5.9%
- Body and structure1 5.9%
Also reported: Suspension (1), Tires (1), Visibility (wipers, defrost, mirrors) (1), Wheels (1).
Example complaints
Transmission and drivetrain: “My 2017 Cadillac CT6 3.0 tt premium luxury has had this issue since I purchased it. Dealership state that this is normal and I should live with it. If I knew this before I purchase this $98,000 vehicle I would have gone mercedes-benz. The issues with the 8-speed 8l90 GM transmission are two-fold. First, the transmission shudders frequently. Secondly, the shifts are very harsh between first to second, and then second down to first, especially when accelerating and the transmission is upshifting or decelerating and the transmission is downshifting. …”
NHTSA complaint #11405442, filed 2021-03, 500 milesElectrical system: “Water is getting into my trunk where the amp is and now my radio does not work only the back up camera. I cannot control the AC or turn on the air conditioner. Or is that how I would like it to blow”
NHTSA complaint #11649426, filed 2025-03Vehicle speed control: “My vehicles transmission has a buzzing noise coming from the transmission oil pan and a gear shifting problem I took vehicle to Cadillac dealer whom can’t find the issue they changed the oil pan and the transmission lines . My vehicle is a 2017 Cadillac ct6 with 72027 miles . I’ve been to 4 Cadillac certified dealers and none can locate to problem . Thank you . Also I would like to add that Cadillac open road In New Jersey has taken off my splash guards and would not return them . …”
NHTSA complaint #11655564, filed 2025-04Mileage when problems were reported
75% of the 4 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 6,000 and 14,000 miles.
Complaints by year filed
Trend: stable. Complaints filed in the last 3 full calendar years are within 25% of the 3 years before.
Fuel economy and running cost
EPA ratings for each 2017 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); plug-in hybrid figures are for gasoline-only (hybrid mode) driving, so no annual cost is shown.
| Version | Engine | Transmission | City | Hwy | Comb. | Fuel / yr |
|---|---|---|---|---|---|---|
| CT6 RWD | 2.0L 4-cyl | 8-speed automatic | 22 | 30 | 25 | $3,300 |
| CT6 AWD | 3.0L 6-cyl | 8-speed automatic | 18 | 26 | 21 | $3,900 |
| CT6 AWD | 3.6L 6-cyl | 8-speed automatic | 18 | 27 | 21 | $3,200 |
| CT6 Plug-In RWD | 2.0L 4-cyl · plug-in hybrid | CVT | 23 | 29 | 26 gas only | — |
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
- 21V759000Sep 29, 2021Exterior lighting › HeadlightsCovers: Cadillac CT6 2016–2017
General Motors, LLC (GM) is recalling certain 2016-2017 Cadillac CT6 vehicles. The Park/Position lights may be excessively bright. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps…
Recall details for the 2017 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. 665 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.
- 11037550Sep 21, 2026Other or unknown. This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
- 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.
- 11027689Jan 12, 2026Other or unknown. This PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
- 11027601Jan 8, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11025755Nov 20, 2025Other or unknown. This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit…
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 2017 Cadillac CT6 have?
NHTSA recorded 17 consumer complaints for the 2017 Cadillac CT6 as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 2017 Cadillac CT6 is reported most often?
Transmission and drivetrain is named most often, in 10 complaints (59% of the total), followed by electrical system with 4.
Has the 2017 Cadillac CT6 been recalled?
NHTSA lists 1 recall campaign for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.
What gas mileage does the 2017 Cadillac CT6 get?
The EPA rates the 2017 Cadillac CT6 (CT6, 2.0L 4-cyl) at 25 mpg combined, 22 city and 30 highway, with an estimated annual fuel cost of $3,300 at 15,000 miles a year. Other engine and drive versions are rated differently.
At what mileage are problems with the 2017 Cadillac CT6 reported?
Among the 4 complaints that include a mileage, the median is 10,000 miles and the middle half falls between 6,000 and 14,000 miles; 75% were filed for vehicles with under 50,000 miles.
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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.