Problems · NHTSA complaints
2016 Cadillac CT6 problems
Owners filed 11 complaints about the 2016 Cadillac CT6 with NHTSA between May 2018 and Oct 2025. The most-cited component is power train (6).
Complaints
11
Filed with NHTSA
Crashes
3
Reported by owners
Fires
0
Reported by owners
Injuries
2
People reported injured
Deaths
1
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Power train6
- Air bags2
- Engine2
- Fuel/propulsion system1
- Suspension1
- Wheels1
- Other / unknown2
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 10, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
2
0
1
1
0
2
1
4
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2018 | 2 |
| 2019 | 0 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 0 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 4 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Power train
6 reports
“I am experiencing recurring transmission and drivability issues with my 2016 Cadillac CT6. 1.Rough Shifting: When shifting from park to reverse, the transmission shifts roughly, causing a noticeable jolt throughout the vehicle. 2.Fluid Leakage: I have observed fluid leaking from underneath the car when parked in my driveway. However, the leak is inconsistent—it disappears for a few days after rain or washing my driveway but then reappears under similar conditions. 3.Delayed Shifting: When accelerating from a stoplight, there is a delay before the transmission engages, causing hesitation before the car moves forward. 4.Automatic Start-Stop Issue: The vehicle has an automatic engine shut-off feature that activates when stopping at a light. When I take my foot off the brake, the engine restarts abruptly, causing a harsh jerk that shakes the entire car. This makes it feel like the transmission or another component is not engaging smoothly. 5.Check Engine Light Issue: The check engine light came on for a day, but before I could take it to a repair facility, it turned off on its own. Because of this, I was unable to retrieve any diagnostic codes. I am concerned these…”
Air bags
2 reports2 crashes
“The contact's husband owned a 2016 Cadillac CT6. The contact stated that while her husband was making a left turn, the vehicle was struck on the front passenger side by another vehicle. The contact stated that her husbands air bag did not deploy. Medical attention was needed, and the contact's husband was transported to the hospital, where he succumbed to his injuries. A police report was taken. The vehicle was towed to the tow lot, where it was deemed a total loss. The contact stated that there were no additional injuries. The manufacturer was not yet notified of the incident. The failure mileage was unknown.”
Engine
2 reports
“The turbo boost failed cylinder 2 ( after being repaired ) continues to show issues”
Fuel/propulsion system
1 report
“Approximately in November 2022, I was driving my 2016 Cadillac CT6. While operating at a normal speed of 40 mph, while in traffic the vehicle began to hesitate and a loss of power. The vehicle was towed to Waldorf Cadillac & Chevrolet. The vehicle was diagnosed with a transfer case issue. The vehicle in the repair shop for approximately 4 months. I retrieve my vehicle in February 2023, with a brand-new Transfer Case with a price tag of $2,200.00. On Thursday, August 3, 2023, I managed to drive the vehicle back to Waldorf Cadillac & Chevrolet to have to vehicle repaired. The vehicle is doing the same thing it was doing , when the vehicle was previously in the Repair Shop. The Technician informed me that Cadillac recommend the fluid in the transmission be changed to a high-performance fluid. This recommendation was issued to the dealers several months ago. Now the dealer is charging me approximately $1,000.00 for Transmission Fluid. I asked the Technician why the problem wasn't corrected while previously in the shop. No reply. If Cadillac knows this is the problem, why is the customer being charged for this service, if this will correct the problem. There is…”
Suspension
1 report1 crash
“THIS CAR HAS SAFETY ISSUES. I PURCHASED A YEAR AGO. THE AXLE AND WHEEL BROKE OFF IN ON THE CAR WITHIN 30 DAYS. THE CAR HAS HUGE MANUFACTURER BREAKDOWN. IT WOULDN'T START DIDN'T CARE WHAT GEAR IT WAS IN IT WAS ROLLING AND ALMOST RAN OVER MY FRIEND AND RAN OFF INTO A DITCH. I HAVE HAD SEVERAL ACCIDENTS IN CAR DUE TO THE REAR SUSPENSION. SHAKING. I BROUGHT IT IN AND NO ONE CAN SEEM TO DUPLICATE IT. BOTH TIRES HAVE BLOW OFF THIS 2016 CT6 WITH 23K MILES ON IT I BOUGHT IT WITH 26 MILES ON IT 100K WARRANTY NO DEDUCTIBLE, SCRATCH DENT AND DING REPAIR AND GMAC OR FRANK KENT WHERE I PURCHASE THE CAR NO WILL THE DEALERS. I BOUGHT THE EXTRA CONTRACTS FOR ARE BLOWING ME OFF. THIS IS RIDICULOUS THE CAR IS IN THE SHOP NOW B/C IT TORE OFF BOTH MIRRORS BACKING INTO GARAGE. I HAVE NO SIDE MIRROR. THE CAR WAS DRIVING ITSELF THEY CORRECT IS SELF AND BACKED INTO WALL. BLOWOUT OF NEW TIRES, NAVIGATION'S ISSUE TELLING ME TO GO TO THE WRONG PLACES BUT SCREEN SHOWS SOMETHING ELSE. HAVING TO CALL ONSTAR JUST TO CHECK DIAGNOSTICS TO SEE IF NEW CAR IS OKAY. BUT THEY CAME BACK WITH GREEN WITH ALL THE BENT, AXLE BROKEN OFF WHEEL, BLOWOUTS NAVIGATION ISSUES AUTO-STOP AND INDICATOR LIGHTS NOT…”
Wheels
1 report1 crash
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.