2018 Cadillac CT6

2018 Cadillac CT6 Review

Cadillac's premium luxury sedan, the 2018 CT6 combines a European feel with bold American design.
7.4 / 10
Edmunds overall rating
by Calvin Kim
Edmunds Editor

Edmunds expert review

The 2018 Cadillac CT6 can best be described as a full-size luxury sedan, but it's priced like a midsize. If you like the idea of a spacious and upscale luxury sedan with a little Detroit attitude, this Cadillac fits the bill.

Under the hood, the CT6's segment-straddling identity is apparent. Turbocharged four-cylinder power is standard, and it's the same engine that's featured in the Cadillac's midsize CTS. You won't find that combination in any of its German competitors.

But there's no doubt that the CT6 reaches new heights of luxury relative to its midsize brethren. Throw in generous rear passenger accommodations, top-shelf interior trimmings and a competitive starting price, and the CT6 becomes a legitimate challenger to the traditional leaders.

What's new for 2018

Changes to the 2018 Cadillac CT6 are primarily technology- and convenience-based. The ability to get over-the-air updates for the vehicle's software is one notable upgrade along with a revised user technology interface, which allows for easier app manipulation. Front-seat ventilation and the heated steering wheel control can be set to automatic while the rearview camera gets its own wash system. Finally, the automatic parking assist now incorporates pedal operation to further automate the parking process.

We recommend

Thanks to its price advantage, the CT6 Platinum, would be our choice. Its impressive standard features list, such as rear-wheel steering, night vision, massaging seats, rear-seat entertainment, and quad-zone climate control, exceed anything from its competitors at a similar price level.

Trim levels & features

The 2018 Cadillac CT6 is a large luxury sedan available in four main trim levels. The base CT6 is well equipped, while the Luxury trim adds high-end safety and convenience features. Next, the Premium Luxury adds even more technology, followed by the Platinum, which makes all options standard.

The base CT6 comes standard with a 2.0-liter four-cylinder turbo engine (265 hp, 295 lb-ft) and includes 18-inch wheels (19s with the V6), front and rear parking sensors, LED headlights and taillights, heated mirrors, a power tilt-and-telescoping steering wheel, an auto-dimming rearview mirror, leather upholstery, eight-way power front seats (with two-way power lumbar), driver-seat memory settings and dual-zone automatic climate control. Also standard on the technology front are GM's OnStar system (with 4G LTE connectivity and Wi-Fi hotspot capability), Bluetooth, a 10.2-inch touchscreen with Cadillac's CUE interface, Apple CarPlay and Android Auto smartphone integration, a rearview camera, voice controls, four USB charge ports, wireless charging and an eight-speaker Bose sound system with satellite radio and three audio USB ports.

An optional Driver Awareness and Convenience package adds a panoramic sunroof, automatic high-beam headlights, automatic wipers, power-folding mirrors, heated front seats, a navigation system and an array of extra safety features (see Safety section for details). There's also an optional V6 engine rated at 335 hp and 284 lb-ft.

The Luxury trim starts with all of the above equipment and adds another engine choice, a 3.0-liter twin-turbo V6 (404 hp, 400 lb-ft), automatic parking system, auto brake hold (prevents forward/rearward creep when your foot is off the brake), a hands-free trunklid, four-way power lumbar for the front seats, front passenger-seat memory settings, a top-down 360-degree parking camera system, rear side window shades, upgraded interior lighting and a 10-speaker Bose surround-sound audio system.

The optional Comfort package adds ventilated front seats and heated rear seats. There is also an Enhanced Vision and Comfort package with those upgraded seats plus a unique rearview mirror that displays streaming video from a special rearview camera.

Moving up to the Premium Luxury gets you an upgraded gauge cluster display, a head-up display, and the Enhanced Vision and Comfort package as standard.

For both the Luxury and Premium Luxury trim levels, an available Rear Seat package bolsters the CT6 Luxury's feature list with a rear entertainment system and four-zone automatic climate control. An available Active Chassis package (not available with the 2.0-liter engine) bundles adaptive suspension dampers, active rear steering and 20-inch wheels. A 34-speaker (yes, 34) Bose Panaray premium audio system is also optional. For the Premium Luxury trim only, an optional Driver Assist package adds adaptive cruise control, a night vision camera system and enhanced safety-related automatic braking.

At the top of the totem pole is the Platinum, which adds all of the above as standard equipment plus 12-way power-adjustable front seats with massage functions, premium leather upholstery, and eight-way power-adjustable outboard rear seats with ventilation.

The Plug-In variant takes many of the options available in the Premium Luxury and Luxury configuration and makes them standard, along with a new 2.0-liter turbocharged hybrid powertrain (335 hp, 432 lb-ft). The Driver Awareness and Convenience and the Enhanced Vision and Comfort packages are all standard. The Hybrid comes with 18-inch wheels and is only available in rear-wheel drive. Due to the large battery pack, you do lose significant trunk volume.

Trim tested

The ratings in this review are based on our Full Test of the 2016 Cadillac CT6 Platinum (twin-turbo 3.0L V6 | 8-speed automatic | AWD).

NOTE: Since this test was conducted, the current 2018 Cadillac CT6 has received some revisions, including a new nine-speed automatic transmission for 2017 and the deletion of the Premier trim level. Our findings remain broadly applicable to this year's 2018 Cadillac CT6.

Edmunds Scorecard

Overall7.4 / 10


7.5 / 10

Acceleration7.5 / 10
Braking9.0 / 10
Steering7.0 / 10
Handling6.5 / 10
Drivability7.0 / 10


7.0 / 10

Seat comfort7.5 / 10
Ride comfort4.5 / 10
Noise & vibration7.0 / 10
Climate control7.5 / 10


8.0 / 10

Ease of use8.0 / 10
Getting in/getting out8.0 / 10
Driving position7.5 / 10
Roominess8.5 / 10
Visibility7.5 / 10
Quality7.5 / 10


7.5 / 10

Small-item storage6.5 / 10
Cargo space7.5 / 10


8.0 / 10

Audio & navigation8.0 / 10
Smartphone integration8.0 / 10
Driver aids8.0 / 10
Voice control7.0 / 10


Formidable acceleration, powerful brakes and a smart transmission give the CT6 a king-of-the-road character that befits its flagship status.


The turbocharged V6 has strong pull from almost any rpm, and quick, smooth upshifts give the sense of virtually uninterrupted power. Zero to 60 mph takes 5.2 seconds, though, which puts this top-of-the-line CT6 midpack among top-shelf sedans.


The CT6's brake pedal is reassuringly firm and easy to modulate. Despite the car's roughly 4,400-pound bulk, the brakes hauled it down from 60 mph in just 102.4 feet in Edmunds testing, a stunning performance for a luxury sedan.


The steering effort gets artificially heavy in Sport mode without adding any tangible value for spirited driving. Left in its default mode, it's light and pleasantly accurate, if typically numb for the segment.


Body roll is held within reasonable bounds, but the CT6 feels large and long. Some cars shrink around you at speed; this isn't one of them. The CTS on which it's based is a great athlete, but the CT6 is unremarkable, like a stretched CTS on novocaine.


Throttle modulation is intuitive, but the transmission sometimes feels as if it has only two modes: "stay in current gear" or "redline ho!" An in-between step would be appropriate for a dignified luxury car.


The CT6 has potential in this category, but our test car's jittery ride held it back. Put the ride aside, and you've got a roomy, well-appointed sedan with a quiet cabin and massaging seats front and rear.

Seat comfort7.5

The wide front seats don't offer much lateral support but are plenty comfortable on long hauls. Massage controls are finicky, but the multiple massage programs are addicting. The rear outboard seats feel first-class and offer massage functions of their own.

Ride comfort4.5

Even on roads we know to be fairly smooth, our CT6 Platinum quivered uncomfortably. The ride was also a bit flinty over impacts, so we never really felt as if it was dialed in the way a car in this class should be.

Noise & vibration7.0

The CT6's 3.0-liter V6 sends vibrations through the steering wheel at 4,500 rpm, which is common for a V6 but unwelcome at this price (e.g., Audi's V6 doesn't do it). The highway ride is hushed, with little wind, road or tire noise to speak of.

Climate control7.5

Strong A/C performance and quiet fan. User-friendly touchscreen interface for climate controls with redundant controls below. Separate controls for rear passengers look like the redundant ones in front. Effective seat heating and cooling front and rear.


High-end materials are just about everywhere you look and touch, and the Platinum model we tested has every available feature. A good showing for the price, although customization options are limited.

Ease of use8.0

Cadillac's infotainment interface has been improved since its introduction. The 10.2-inch touchscreen features large, easy-to-understand icons and a sensible menu structure. Other controls are mostly user-friendly as well, so it's an easy car to live with.

Getting in/getting out8.0

Large doors afford wide openings all around, and the CT6's seats are at the perfect height to slide right in. Convenient and welcoming for all ages and stages.

Driving position7.5

The CT6's power-adjustable wheel doesn't telescope out far enough, so it'll be a reach if you need to slide the seatback a ways. The wheel itself feels substantial in your hands, and gauge visibility is excellent. Up and down range for the seat is ample.


Tons of rearward travel for the front seats, and generous room in all other directions. Taller drivers have plenty of space. Rear-seat room is also ample, even for larger folks, but there are no footrests as in some competitors.


The view out is satisfactory front and rear. You don't feel as if you're peering out of a bunker. The streaming-video rearview mirror had us seeing double due to the different focal point, but it shows a wider view of what's behind (and can be turned off).


The CT6 Platinum's cabin is swathed in leather and chrome interior trim is thankfully sparse. Overall, the effect isn't quite as nice as what you get from Audi or Mercedes-Benz, but it's getting harder to pinpoint the flaws.


At heart, the CT6 is a stretched version of a midsize sedan (the CTS), and that shows in its relatively short and small trunk. Cadillac could also do a better job at providing interior storage options; the stylishness of the dashboard and center stack seem to have taken priority.

Small-item storage6.5

The touchpad on the center console takes up some space that might otherwise be used for phone storage. You'll manage in the CT6, but your phone might end up in one of the cupholders. Decent room for other stuff under the center armrest.

Cargo space7.5

The trunk has a wide opening that's great for loading large items such as golf bags. The trunk narrows abruptly at the rear wheelwells, however, and overall volume is modest at 15.3 cubic feet.

Child safety seat accommodation8.0

The CT6's long rear doors and large back seat give it an inherent advantage compared to smaller sedans. A rear-facing child seat should fit with no need to adjust the position of the corresponding front seat. The two sets of LATCH anchors are easy to access.


Technology is a strong suit for the CT6, especially now that the user interface has been revised with a beautiful 10.2-inch display and quicker response times. If you're looking for high-tech features that are also user-friendly, the CT6 is a good pick.

Audio & navigation8.0

Cadillac's CUE system has been improved. The touchscreen looks great and responds promptly to commands. The redundant touchpad between the seats provides odd haptic vibration feedback. Bose Panaray system sounds rich and full.

Smartphone integration8.0

Apple CarPlay and Android Auto come standard on the CT6. Cadillac's got you covered with four USB charge ports, three USB audio ports and wireless charging to boot. Bluetooth phone pairing is quick and painless.

Driver aids8.0

The CT6 Platinum comes standard with adaptive cruise control, forward collision mitigation, lane departure intervention, blind-spot monitoring, rear cross-traffic alert and a night vision system. There's also a streaming-video rearview mirror.

Voice control7.0

Our repeated attempts to change iPhone playlists were unsuccessful even though we used the proper voice command structure ("Play playlist [name]"). Instead, a sustained press of the voice button accesses the iPhone's Siri voice commands, which work quite well.

Edmunds expert review process

This review was written by a member of Edmunds' editorial team of expert car reviewers. Our team drives every car you can buy. We put the vehicles through rigorous testing, evaluating how they drive and comparing them in detail to their competitors.

We're also regular people like you, so we pay attention to all the different ways people use their cars every day. We want to know if there's enough room for our families and our weekend gear and whether or not our favorite drink fits in the cupholder. Our editors want to help you make the best decision on a car that fits your life.