“Get it it's the most room they had in years and it is full of fun safety devices with a very nice ride and still over 300 horses”
2018 Cadillac CT6: What's New, Specs & Features
Last updated August 4, 2026
The biggest change for the 2018 Cadillac CT6 is the debut of Super Cruise hands-free highway driving on upper trims. Otherwise, this is a light update that keeps the same basic design and core engines.
About the 2018 Cadillac CT6
1st generation (2016-2020 U.S.), pre-refresh, last year before the 2019 facelift.
Cadillac positions the CT6 as its flagship sedan built around performance, innovation, and craftsmanship rather than old-school soft isolation alone. It is meant to give buyers full-size sedan space and prestige with a lighter, more responsive feel than many traditional large luxury sedans. The CT6’s main appeal is that it blends striking Cadillac styling, advanced technology, and a roomy cabin with driving manners that feel more athletic than its size suggests.
The 2018 CT6 lineup ranges from roomy, leather-trimmed entry models with a 10.2-inch touchscreen to upper trims focused on richer cabin technology and rear-seat comfort. Premium Luxury models feature a 12-inch digital gauge display, head-up display, and rear camera mirror, while Platinum adds massaging front and rear seats and a 34-speaker Bose audio system. The lineup also includes a twin-turbo V6 for stronger performance and a plug-in hybrid with meaningful electric driving capability.
What changed, by category
Safety
Super Cruise debuts for 2018, bringing hands-free highway driving to the CT6. It is standard on Platinum and offered through a package on Premium Luxury.
Tech
Ventilated front seats change from optional to standard on both the 3.6 and 3.0 Twin Turbo Premium Luxury trims.
2018 Cadillac CT6 specs and features by trim
| Feature | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Engine | V6, 3.6 Liter | 4-Cyl, Hybrid, Turbo, 2.0 Liter | 4-Cyl, Turbo, 2.0 Liter | V6, 3.6 Liter | V6, 3.6 Liter | 4-Cyl, Turbo, 2.0 Liter | V6, 3.6 Liter | V6, Twin Turbo, 3.0 Liter | V6, Twin Turbo, 3.0 Liter | V6, Twin Turbo, 3.0 Liter |
| Transmission | Automatic, 8-Spd | Automatic, EVT | Automatic, 8-Spd | Automatic, 8-Spd | Automatic, 8-Spd | Automatic, 8-Spd | Automatic, 8-Spd | Automatic, 8-Spd | Automatic, 8-Spd | Automatic, 8-Spd |
| Drivetrain | AWD | RWD | RWD | AWD | AWD | RWD | AWD | AWD | AWD | AWD |
| Fuel Type | Gas | Plug-In Hybrid | Gas | Gas | Gas | Gas | Gas | Gas | Gas | Gas |
| MPG City | 18 mpg | 22 mpg | 18 mpg | 18 mpg | 22 mpg | 18 mpg | 18 mpg | 18 mpg | 18 mpg | |
| MPG Highway | 27 mpg | 30 mpg | 27 mpg | 27 mpg | 30 mpg | 27 mpg | 26 mpg | 26 mpg | 26 mpg | |
| Horsepower | 335 hp | 265 hp | 335 hp | 335 hp | 265 hp | 335 hp | 404 hp | 404 hp | 404 hp | |
| Torque | 284 lb-ft | 295 lb-ft | 295 lb-ft | 284 lb-ft | 284 lb-ft | 295 lb-ft | 284 lb-ft | 400 lb-ft | 400 lb-ft | 400 lb-ft |
| Max Towing | 1000 lb | 1000 lb | 1000 lb | 1000 lb | 1000 lb | 1000 lb | 1000 lb | 1000 lb | 1000 lb | 1000 lb |
| Trunk/Cargo | 15.3 cu-ft | 10.6 cu-ft | 15.3 cu-ft | 15.3 cu-ft | 15.3 cu-ft | 15.3 cu-ft | 15.3 cu-ft | 15.3 cu-ft | 15.3 cu-ft | 15.3 cu-ft |
| Rear Legroom | 40.4 in | 40.4 in | 40.4 in | 40.4 in | 40.4 in | 40.4 in | 40.4 in | 40.4 in | 40.4 in | 40.4 in |
| Seats | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Doors | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Electric Range | 31 | |||||||||
| MPGe Combined | 62 | |||||||||
| Adaptive Cruise Control | ||||||||||
| Alarm System | ||||||||||
| Automatic High Beams | ||||||||||
| Blindspot Sensors | ||||||||||
| Lane Departure Warning | ||||||||||
| Night Vision System | ||||||||||
| Park Assist | ||||||||||
| Rain Sensing Windshield Wipers | ||||||||||
| Rear View Camera | ||||||||||
| 360 Camera | ||||||||||
| Alloy Wheels | ||||||||||
| Auto-Dimming Exterior Mirrors | ||||||||||
| LED Headlights | ||||||||||
| Panorama Moon Roof | ||||||||||
| Power Folding Exterior Mirrors | ||||||||||
| Power Liftgate/Trunk Release | ||||||||||
| Rear Spoiler | ||||||||||
| Navigation System | ||||||||||
| Premium Audio | ||||||||||
| Smartphone Interface | ||||||||||
| 4-Zone Automatic Air Conditioning | ||||||||||
| Dual Power Rear Seats | ||||||||||
| Dual-Zone Climate Control | ||||||||||
| Folding Rear Seat | ||||||||||
| Heated Front Seats | ||||||||||
| Heated Rear Seats | ||||||||||
| Heated Steering Wheel | ||||||||||
| Leather Seats | ||||||||||
| Leather-Wrapped Steering Wheel | ||||||||||
| Massage Front Seat | ||||||||||
| Massage Rear Seat | ||||||||||
| Memory Front Seats | ||||||||||
| Push-Button Engine Start | ||||||||||
| Rear Window Shades | ||||||||||
| Remote Start | ||||||||||
| Ventilated Front Seats | ||||||||||
| Ventilated Rear Seats | ||||||||||
Frequently asked questions
What is the main difference between the 2018 and 2017 Cadillac CT6?
The main difference is the arrival of Super Cruise hands-free highway driving on select 2018 CT6 upper trims. The basic design and core engine lineup carry over from 2017.
Which 2018 Cadillac CT6 trims have Super Cruise?
Super Cruise is standard on 2018 CT6 Platinum models and offered through the Super Cruise Package on Premium Luxury models. It is not a lineup-wide feature.
Was the 2018 Cadillac CT6 redesigned?
No, the 2018 CT6 was not redesigned. It remains a first-generation, pre-refresh model with the same basic body, cabin layout, and core engines; the major facelift arrives for 2019.
What changed on the 2018 CT6 Premium Luxury trims?
The 2018 CT6 Premium Luxury trims add access to Super Cruise through an option package, and ventilated front seats become standard instead of optional. This applies to both the 3.6 and 3.0 Twin Turbo Premium Luxury versions.
Does the 2018 Cadillac CT6 still have a plug-in hybrid model?
Yes, the 2018 CT6 lineup still includes the rear-wheel-drive PLUG-IN model with a turbocharged four-cylinder engine and electric motors. It is the plug-in hybrid’s final U.S. model year.
2018 Cadillac CT6 Reviews
What owners are saying about the 2018 Cadillac CT6.
4.3
2018 Cadillac CT6
(178 reviews)
“I am very impressed with the vehicle itself. I like the wider seats in the front, I like the massage feature especially on long trips, I like the adaptive cruise, I like the automous drive, I did not like the fact that when I went to plug my radar detector in there was no convenient plug in the front of the car.”
“Smooth riding, total control of the highway steering, 28-32 miles a gallon depending on my speed, room to spare and a huge trunk with tons of options”