AutoUtility currently tracks 12 official NHTSA owner defect complaints for the 2018 Cadillac CT6. Powertrain & Transmission issues are the most frequently reported category, appearing in 4 complaints (33.3% of submitted records). Zero crashes, fires, injury reports, or fatality reports are cited across these complaint records.
- • Total NHTSA Complaints: 12 reports
- • #1 Reported Problem Area: Powertrain & Transmission (4 reports • 33.3% of submitted complaints)
- • Secondary Problem Areas: Engine & Cooling (3), Steering System (3)
- • Crash-Citing Complaints: 0 filings
- • Fire-Citing Complaints: 0 filings
- • Complaints Reporting Injuries / Fatalities: 0 injury filings • 0 fatality filings
Most Reported Problems for 2018 Cadillac CT6
Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records
Powertrain & Transmission
Engine & Cooling
Steering System
Fuel & Propulsion System
Brakes & Traction Control
Recent NHTSA Owner Reports for 2018 Cadillac CT6
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"When vehicle was purchased new there was a slight bearing wear noise at the front driver side, which grew louder with years. Noise synchronized with tire rolling rpm. Replacing (my self) front trans axle, the brake pads, shaving rotors, & wheel hub bearing did not fix noise. Next; Dealer shop..."
"During refueling the gas station pumping nozzle would shut off indicating a full gasoline fuel tank; but, the dash board fuel gage indicated the fuel was not full. Had to dribble in fuel to fill. Dealer Mechanic found: Crash roll over gasoline vent safety valve was stuck in the crashed roll over..."
"Stuck Thermostat. Vehicle not achieving operating temperature in the correct time. ALL 3 of the people I know with CT-6's had the exact same issue this year."
"Front differential case ripped in half and separated from the ring gear. The broken chunk of differential case and pinion was still attached to the driveshaft while coming to an abrupt stop. Damage done within driveshaft tunnel. No warning, no vibration, no cause for concern, just catastrophic..."
"Yes my car was sold to me with structural damages, and I was told any of this when I purchased it!!!!"
Complaint History for Cadillac CT6
Reported defect complaint volume across sibling model years (2016–2020)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2016 Cadillac CT6 | 11 | 3 | 3 | View 2016 Problems → |
| 2017 Cadillac CT6 | 26 | 0 | 2 | View 2017 Problems → |
| 2018 Cadillac CT6 Current Page | 12 | 0 | 2 | Current |
| 2019 Cadillac CT6 | 16 | 0 | 4 | View 2019 Problems → |
| 2020 Cadillac CT6 | 11 | 2 | 2 | View 2020 Problems → |
Detailed NHTSA Component Breakdown for 2018 Cadillac CT6
Complete distribution of consumer defect reports across all 10 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Reported Injury Entries | Reported Fatality Entries |
|---|---|---|---|---|---|
| Powertrain NHTSA category: POWER TRAIN | 3 | 0 | 0 | 0 | 0 |
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| Engine NHTSA category: ENGINE | 1 | 0 | 0 | 0 | 0 |
| EXTERIOR LIGHTING | 1 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| SERVICE BRAKES,ENGINE | 1 | 0 | 0 | 0 | 0 |
| STEERING,ELECTRONIC STABILITY CONTROL (ESC),ENGINE | 1 | 0 | 0 | 0 | 0 |
| STEERING,FORWARD COLLISION AVOIDANCE,LANE DEPARTURE | 1 | 0 | 0 | 0 | 0 |
| STEERING,SUSPENSION,STRUCTURE | 1 | 0 | 0 | 0 | 0 |
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.