Cadillac’s flagship CT6 is an impressive luxury car. Plush, roomy, quick, agile and high-tech, it just might be worthy of Cadillac's old slogan: “Standard of the World.” The CT6’s stellar Road Test score certainly ranks it among the best sedans. Our qualms revolve around a few interior quibbles, and the brand’s less-than-stellar predicted reliability rating. The CT6 slots in between two defined sedan classes.
Alerts
There is 1 recall on this vehicle. Learn More.

Reliability

Reliability indicates how models have performed in the past, providing the basis for predicting how the vehicles will hold up in the year ahead. These charts provide the most comprehensive reliability information available to consumers. Based on information received from our latest subscriber survey, our reliability history charts give you a rundown on how used vehicles are holding up in 17 potential trouble spots, ranging from the engine, transmission, and brakes to power equipment and the electrical system.

Overall Reliability
Most Common Trouble Spots
Common Trouble Spot
Common Trouble Spot
The 2017 Cadillac CT6 has been recalled 1 time by NHTSA. View Recalls
Research Years * Redesign year
Worse Better
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Overall Reliability Verdict
NA
NA
NA
NA
POTENTIAL TROUBLE SPOTS
Engine Major
NA
NA
NA
NA
Engine Minor
NA
NA
NA
NA
Engine Cooling
NA
NA
NA
NA
Transmission Major
NA
NA
NA
NA
Transmission Minor
NA
NA
NA
NA
Drive System
NA
NA
NA
NA
Fuel System
NA
NA
NA
NA
Electric System
NA
NA
NA
NA
Climate System
NA
NA
NA
NA
Suspension
NA
NA
NA
NA
Brakes
NA
NA
NA
NA
Exhaust
NA
NA
NA
NA
Paint/Trim
NA
NA
NA
NA
Body Integrity
NA
NA
NA
NA
Body Hardware
NA
NA
NA
NA
Power Equipment
NA
NA
NA
NA
In-car Electronics
NA
NA
NA
NA
Reliability indicates how models have performed in the past, providing the basis for predicting how the vehicles will hold up in the year ahead. These charts provide the most comprehensive reliability information available to consumers. Based on information received from our latest subscriber survey for about 329,000 vehicles, our reliability history charts give you a rundown on how 2000 through 2020 vehicles are holding up in 17 potential trouble spots, ranging from the engine, transmission, and brakes to power equipment and the electrical system. NA indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.

Learn more about car Reliability.

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2017 Cadillac CT6 owners. The owner comments describe problems respondents experienced with this vehicle.

Transmission Minor

Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.

What Owners Say

Rough shifting

"the fluid was changed in transmission ,works fine since."

Dale S., FL (2017 Cadillac CT6 Luxury 3.6-L V6)

"transmission seems to get confused--doesn't know which gear to select. sometimes a lag while it tries to sort things out."

Anonymous, NJ (2017 Cadillac CT6 Platinum 3.0-L V6 turbo)

"THE CAR SHIFTS SO HARD YOU THINK YOU JUST GOT REAR ENDED!! THE DEALER SAID ITS NORMAL AND I'VE BEEN FIGHTING WITH THEM .FROM DAY ONE!! IF IT WAS NORMAL IT WOULD DO IT ALL THE TIME BUT IT DOESN'T"

Robert M., NJ (2017 Cadillac CT6 Platinum 3.0-L V6 turbo)

"Occasional violent lurch when shifting to/from low to next higher gear. Could be a safety hazard."

Anonymous, NH (2017 Cadillac CT6 Premium 3.0-L V6 turbo)

"When standing at a stop and then taking my foot off of the brake this vehicle would lurch forward at times. Some of the lurches felt as if the vehicle had been rear ended. This did not occur all of the time but, when I took this vehicle to have the problem looked at, Cadillac/GM apparently could not replicate the problem. Long story short: I hired a lemon law attorney and GM eventually repurchased this vehicle from me at a cost that was much higher than if GM had just replaced or repaired this issue. It was also common knowledge that certain GM vehicles with the 8 speed transmission had the same problem that my vehicle had."

Michael W., NV (2017 Cadillac CT6 Premium 3.0-L V6 turbo)

"1ST TO 2ND SHIFT IS SO HARD IT FEELS LIKE YOU JUST GOT REAR ENDED.BUT I WAS TOLD ITS NORMAL."

Anonymous, NJ (2017 Cadillac CT6 Platinum 3.0-L V6 turbo)

"During slow maneuvers, the transmission will shift extremely roughly and sometimes cause almost whiplash."

Anonymous, OH (2017 Cadillac CT6 Platinum 3.0-L V6 turbo)

"Service was unable to get transmission into smooth operation. Problem is at slow speeds or starting from a full stop."

Anonymous, RI (2017 Cadillac CT6 Platinum 3.6-L V6)

"When transmission is cold, it shifts up and down very jerky in lower gears(1st and 2nd)"

Anonymous, OH (2017 Cadillac CT6 Premium 3.0-L V6 turbo)
Slipping transmission

"While standing at a complete stop and then removing my foot from the brake before reaching the accelerator, this vehicle would lurch on occasion. The lurch was sometimes hard enough to feel as if the vehicle was rear ended. It did not happen all of the time but some of the time was still too much. Taking the vehicle to Cadillac dealers did not resolve the problem. I took it to 2 dealers in California and 1 in Nevada and they all stated that they could not replicate the problem that I complained about. I hired a lemon law attorney and, eventually, GM repurchased this vehicle from me at a cost that I believe was much higher than GM just repairing or replacing the transmission. In doing research, I found that other GM vehicles (with the 8 speed transmission) had the same issues that I had."

Michael W., NV (2017 Cadillac CT6 Premium 3.0-L V6 turbo)

"car has always shifted hard/rough. has had computer adjusted frequently for updates. also have been told it was in the wrong mode"

Anonymous, MI (2017 Cadillac CT6 Premium 3.6-L V6)

In-car Electronics

CD or DVD players, radio, speakers, GPS, communication system (e.g., OnStar), display screen freezes or goes blank, phone pairing (e.g. Bluetooth), voice control commands, steering wheel controls, portable music device interface (e.g., iPod/MP3 player), backup or other camera/sensors.

What Owners Say

Apple CarPlay

"unreliable--sometimes connects perfectly and others not at all. Stops working and then can't get it to work again."

Anonymous, NJ (2017 Cadillac CT6 Platinum 3.0-L V6 turbo)
Radio

"The radio would blank out. Stop operating for long periods of time and the screen would also lose its memory. It is an intermittent problem that has not yet been fixed."

Jeffrey W., OH (2017 Cadillac CT6 Platinum 3.6-L V6)
Voice control commands

"System is unable to understand commands"

James F., PA (2017 Cadillac CT6 Premium 3.0-L V6 turbo)

Electric System

Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.

What Owners Say

Interior lights

"wire was pinched"

Anonymous, MI (2017 Cadillac CT6 Premium 3.6-L V6)
Keyless entry

"Batteries for the fobs don't last. Had to learn to replace them myself so I wouldn't have to drive an hours round trip and waste my time for the dealership to replace them"

James F., PA (2017 Cadillac CT6 Premium 3.0-L V6 turbo)

Body Integrity

Squeaks, rattles, wind noises, loose or cracked seals and/or weather-stripping, air and water leaks.

What Owners Say

Air or water leaks

"Water leak in corner of the sun roof. Took 3 trips to dealer to fix it."

Anonymous, MD (2017 Cadillac CT6 Luxury 3.6-L V6)
Squeaks or rattles

"seat belt retainer rattle in the driver's door. Have replaced it but the rattle remains. Dealer is stumped."

Anonymous, NJ (2017 Cadillac CT6 Platinum 3.0-L V6 turbo)

Climate System

Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.

What Owners Say

Refrigerant leaks

"Problem was intermittent. It would blow cool, then suddenly blow warm- then repeat. They had to remove the dash to replace the evaporator (or compressor- not sure)"

Anonymous, FL (2017 Cadillac CT6 Luxury 3.6-L V6)

Drive System

Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.

What Owners Say

Electrical failure

"Replacement of coolant/air separator unit for the drive motor battery(the high-voltage charging system had stopped functioning). The unit was replaced under warranty."

Anonymous, CA (2017 Cadillac CT6 Premium 2.0-L 4 Cyl plug-in hybrid)

Suspension

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

What Owners Say

Wheel balance

"vibration in the steering wheel and entire car--seats, etc. Dealer said that the rims were bent and one of the tires too out of round to balance--had to replace it and do an alighnment."

Anonymous, NJ (2017 Cadillac CT6 Platinum 3.0-L V6 turbo)

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.

Power Equipment

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, remote engine start, alarm or security system

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, leaks.

Brakes

Antilock system (ABS), parking brake, master cylinder, calipers, rotors, pulsation or vibration, squeaking, brake failure or wear.

Paint/Trim

Paint (fading, chalking, cracking, or peeling), loose interior and exterior trim or moldings, rust.

Engine Cooling

Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.

Body Hardware

Power or manual windows, locks and latches, tailgate, hatch or trunk, doors or sliding doors, mirrors, seat controls, safety belts, sunroof, convertible top.

Fuel System

Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.

Compare 2017 Models

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This score shows whether the model had more or fewer problems overall than the average model of that year, calculated from the total number of problems reported by subscribers in all 17 trouble spots.
Recalls
PROVIDED BY
SEATS:MID/REAR ASSEMBLY
Jun 28 2018
If the child seat cannot be attached correctly to the anchorage bar, there is an increased the risk of injury.
Summary:
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. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
What should you do:
GM will notify owners, and dealers will inspect, remove any excess adhesive, and apply anti-corrosion primer to the inboard child seat anchorage bars, free of charge. The recall began August 3, 2018. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 18228.
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
NHTSA CAMPAIGN ID Number: 18V437000
Potential Number of Units Affected: 22043
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