Own a Cadillac CT6 in the Phoenix area? EZ Swap LLC repairs and maintains the Cadillac CT6 for model years 2016 to 2020. Our shop at 9050 N 9th St handles everything from routine service to diagnostics and major repairs.
To help CT6 owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 77 owner complaints on file for the CT6 and 8 safety recall campaigns. The most-reported problem areas are power train (47), engine (8), service brakes (8).
Most-Reported Cadillac CT6 Problems
These problem areas come up most often in NHTSA owner complaints for the CT6 (all model years combined). Complaint counts reflect reports filed, not the share of vehicles affected, so popular and older models naturally have more.
| Problem area (NHTSA component) | Complaints | Share | |
|---|---|---|---|
| Power Train | 47 | 61% | |
| Engine | 8 | 10% | |
| Service Brakes | 8 | 10% | |
| Electrical System | 7 | 9% | |
| Forward Collision Avoidance | 5 | 6% | |
| Fuel/Propulsion System | 4 | 5% | |
| Suspension | 4 | 5% | |
| Structure | 4 | 5% |
Power Train
47 of the 77 complaints (61%) mention the powertrain. Powertrain complaints can range from rough shifting to loss of drive. We road test, scan for stored codes and inspect fluids before recommending any repair. See our auto repair page.
Engine
8 of the 77 complaints (10%) mention the engine and cooling system. Engine and cooling complaints are best caught early in Phoenix, where heat pushes cooling systems and engine oil to their limits. We diagnose warning lights and check coolant, hoses and oil condition. See our check engine light diagnostics and oil change & maintenance pages.
Service Brakes
8 of the 77 complaints (10%) mention brakes. Brake complaints turn up on nearly every vehicle, and Phoenix stop-and-go traffic wears brake parts quickly. We measure pads and rotors, check calipers and fluid, and replace only what is worn. See our brake repair page.
Cadillac CT6 Complaints by Model Year
The CT6 model years with the most NHTSA complaints on file are 2017, 2019, 2018. Older model years have had more time to collect reports, so use this table as a guide for what to inspect, not as a verdict on any one vehicle.
| Model year | Complaints on file | |
|---|---|---|
| 2016 | 11 | |
| 2017 | 26 | |
| 2018 | 12 | |
| 2019 | 17 | |
| 2020 | 11 |
Most Common Cadillac CT6 Check Engine Codes
Owners often put the exact trouble code in their NHTSA complaint. These are the codes cited most often for the CT6. The most-cited is P0747 (powertrain code), mentioned in 2 complaints. Counts reflect complaints that name a code, not every car on the road.
| Code | What it means | Complaints citing it |
|---|---|---|
| P0747 | Powertrain code A scan and test is needed to confirm what this code means for your vehicle. | 2 |
A code is a clue, not a diagnosis. The same code can have several causes, so we test before replacing parts. See our check engine light diagnostics, and read whether it is safe to drive with the check engine light on.
Cadillac CT6 Safety Recalls
NHTSA lists 8 recall campaigns for the CT6 in these model years, most often involving seat belts, exterior lighting, seats. Recalls are repaired by the manufacturer at no charge to you, but each applies only to certain vehicles. Look up your VIN at nhtsa.gov/recalls.
- 2025 recall, Power Train (campaign 25V148000): General Motors LLC (GM) is recalling certain 2019-2020 Cadillac CT6, 2020-2021 CT4, CT5, and 2020-2022 Chevrolet Camaro vehicles equipped with a 10-speed transmission.
- 2021 recall, Exterior Lighting (campaign 21V759000): General Motors, LLC (GM) is recalling certain 2016-2017 Cadillac CT6 vehicles. The Park/Position lights may be excessively bright.
- 2019 recall, Service Brakes, Hydraulic (campaign 19V889000): General Motors LLC (GM) is recalling certain 2019 Chevrolet Silverado 1500, Cadillac CT6, and GMC Sierra 1500 vehicles.
- 2019 recall, Exterior Lighting (campaign 19V117000): General Motors LLC (GM) is recalling certain 2019 Cadillac CT6 vehicles. Rotation of the steering wheel will not automatically cancel the turn-signals from flashing.
- 2019 recall, Tires (campaign 19V731000): General Motors LLC (GM) is recalling certain 2020 Cadillac CT6 vehicles equipped with dealer-installed accessory 20" x 8.50" wheels (RPO 5JO or SHH).
- 2018 recall, Seats (campaign 18V437000): General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CT6 vehicles. The inboard child seat anchorage bars may have had excess structural adhesive applied during assembly, which can interfere with the installation of a child seat.
Serious Incident Reports
Of the NHTSA complaints on file for the CT6, 5 involved a crash, 2 reported injuries. These numbers are drawn from self-reported complaints and are not verified findings. If your vehicle has an open recall, get it repaired promptly.
Keeping a Cadillac CT6 Reliable in Phoenix
Arizona heat is the hardest test a Cadillac will face. Batteries, belts, hoses, tires and engine oil all wear faster here, and a CT6 that spends its life in stop-and-go Valley traffic needs maintenance earlier than the owner's manual's normal schedule suggests.
Our recommendation for CT6 owners: follow the severe-service schedule, test the battery before every summer, inspect brakes and tires twice a year, and have any warning light diagnosed instead of ignored. If you are shopping for a used Cadillac CT6, a pre-purchase inspection shows what the paperwork does not.
Cadillac CT6 Services at EZ Swap LLC
Get the details on our Phoenix Cadillac CT6 repair service, or choose a service below.
Auto Repair
All makes and models, from domestic trucks to imports.
Details →Check Engine Light Diagnostics
Scan, test and pinpoint the real cause.
Details →Oil Change & Maintenance
Oil, filters, fluids, tires and scheduled service.
Details →Brake Repair
Pads, rotors, calipers, fluid and brake lines.
Details →Car A/C Repair
Phoenix heat demands cold air.
Details →Cadillac CT6 FAQ
What are the most common problems with the Cadillac CT6?
Based on NHTSA owner complaints, the most-reported problem areas for the Cadillac CT6 are power train (47), engine (8), service brakes (8). Complaint counts reflect reports filed, not the share of vehicles affected.
Which CT6 model years have the most complaints?
The CT6 model years with the most NHTSA complaints on file are 2017, 2019, 2018. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What are the most common check engine codes on the Cadillac CT6?
In NHTSA owner complaints for the Cadillac CT6, the codes cited most often are P0747 (powertrain code). A code points to a system, and testing confirms the actual failed part.
Does the Cadillac CT6 have any safety recalls?
NHTSA lists 8 recall campaigns for the Cadillac CT6 across model years 2016 to 2020. Each recall applies only to certain vehicles, so enter your VIN at nhtsa.gov/recalls to see if yours is affected.
Do you repair the Cadillac CT6 in Phoenix?
Yes. EZ Swap LLC repairs and maintains Cadillac vehicles including the CT6, at 9050 N 9th St in Phoenix. Call or text (602) 246-9063 for an appointment.
Is a pre-purchase inspection worth it for a used Cadillac CT6?
Yes. An inspection checks the engine, transmission, brakes, suspension, A/C and electrical system, and scans for stored codes, so you know the real condition before you buy.
How often should I service my Cadillac CT6 in Phoenix?
Follow the severe-service schedule in your owner's manual, since heat and stop-and-go driving count as severe use. Test the battery before summer and inspect brakes and tires regularly.
More Cadillac Models We Service
Source: public complaint and recall records from the National Highway Traffic Safety Administration (nhtsa.gov). Counts reflect reports filed and do not predict the condition of any individual vehicle.