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2018 Cadillac CT6
#4 Best Luxury Full-Size Cars of 2018

Used 2018 Cadillac CT6

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2020
2018
Fuel Economy
21 - 25 combined mpg
Horsepower
265 - 404 hp
Engine
4 engines available
Engine Options
  • 4-Cyl, Hybrid, Turbo, 2.0 Liter
  • 4-Cyl, Turbo, 2.0 Liter
  • V6, 3.6 Liter
  • V6, Twin Turbo, 3.0 Liter
Cargo Volume
10.6 - 15.3 cu ft
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2018 Cadillac CT6 Review

Keith Buglewicz

Updated May 16, 2025

Pros

The Cadillac CT6 is the best interpretation yet of Caddy’s Art and Science design language, and its uniquely American interior sacrifices no luxury to its European and Japanese competitors. The high-tech features will capture the attention of younger buyers, and its turbocharged engines and excellent handling will win over enthusiasts.

Cons

There’s no long-wheelbase version, and while the back seat is available with an executive package, the CT6 is shorter than many rivals. There’s also no V8 available, and while the CT6 is a very nice luxury sedan, Cadillac still needs to rebuild its brand equity to BMW and Mercedes-Benz levels.

What's New?

After last year’s introduction of the plug-in hybrid, only modest changes are in store for the 2018 Cadillac CT6. Among new colors and trim, the Auto Parking Assist now allows hands- and feet-off automatic parking. Additionally, a new entertainment system package bundles the rear-seat entertainment system and the excellent Panaray audio system.

The 2018 Cadillac CT6 aims to convince you that Caddy can beat luxury heavyweights like the BMW 7 Series, Lexus LS and Audi A8 at their own game. Draping the uniquely American styling language already established for CTS and ATS models on its low, wide body, Cadillac has packed the 2018 CT6 with luxury and technology. The interior’s sumptuousness exceeds any other Cadillac, there’s state-of-the-art technology, and the drivetrains — including a twin-turbo V6, rear- or all-wheel drive, and even a plug-in hybrid — complement the sharp handling and luxurious ride. Yet, like its competition, the 2018 Cadillac CT6 is more than just the sum of its parts. This car feels special, offering a unique driving experience that matches, and in some ways surpasses, its competitors.

2018 Cadillac CT6 Pricing

2018 Cadillac CT6 pricing starts at $19,035 for the CT6 2.0 Turbo Sedan 4D, which had a starting MSRP of $55,090 when new. The range-topping 2018 CT6 3.0 Twin Turbo Platinum Sedan 4D starts at $27,959 today, originally priced from $89,290.

Original MSRP
KBB Fair Purchase Price (national avg.)
$55,090
$19,035
$57,090
$20,528
$60,190
$21,867
$62,190
$22,217
$66,190
$25,927
$66,290
$23,039
$70,290
$23,446
$76,090
$25,043
$85,290
$30,195
$89,290
$27,959

The Kelley Blue Book Fair Purchase Price for any individual used vehicle can vary greatly according to mileage, condition, location, and other factors. The prices here reflect what buyers are currently paying for used 2018 Cadillac CT6 models in typical condition when purchasing from a dealership. These prices are updated weekly.

Driving the Cadillac CT6

Cadillac has established enviable weight-saving voodoo that must flummox its rivals. The 2018 CT6, for example, is notably larger than the CTS, yet it weighs only 17 pounds more, and is nearly 1,000 pounds lighter than a Mercedes-Benz S-Class or BMW 7 Series. Combine this weight-saving advantage with a rigid structure, excellent engines and advanced suspension setup, and the CT6 moves with an agility that you’ll need to experience to believe. Even the base, rear-wheel-drive (RWD) CT6 with the 2.0-liter turbocharged 4-cylinder is an absolute joy to drive. Toss in all-wheel drive (AWD), the 404-horsepower turbo V6 and the Active Chassis Package with 4-wheel steering, and you’ll get a car equally at home on the Nurburgring as it is the 405 Freeway. Yet when you’re just cruising, the CT6 is just as enjoyable; with a comfortable ride and outstanding sound system, the Cadillac CT6 proves its luxury game is just as strong.

Interior Comfort

Cadillac’s 2018 CT6 offers a uniquely styled interior, distinct from its German and Japanese rivals, yet boasting the tasteful blend of wood, fine leather, and metallic and carbon-fiber trim expected in a car in this class. The 8.0-inch configurable instrument cluster on lower-end models gets replaced by a 12-inch screen in Premium Luxury and Platinum models, which combines with the standard 10.2-inch CUE touch-screen infotainment system to give the CT6 an oh-so-modern “glass cockpit.” The comfortably supportive front seats are matched by an equally accommodating rear bench that offers an “executive” option, complete with recline and massage functions.

Exterior Styling

Cadillac calls its current design language “Art and Science,” and it’s a uniquely American interpretation of universal luxury themes. The long hood implies — correctly — a powerful rear-wheel-drive sedan, and the crisply tailored aluminum body shows off chiseled lines and an expressive face. The Platinum model gets a unique grille, but all CT6 models get LED headlights, framed by vertical LED light blades; in back are vertical LED taillights. Beyond model-specific 18-inch, 19-inch and 20-inch alloy wheels, trim grades are largely differentiated by detail touches like front cornering lights and illuminated door handles.

Favorite Features

BOSE PANARAY AUDIO SYSTEM
If you consider yourself an audiophile, a music enthusiast, or if you just have functioning ears, you’ll appreciate the Bose Panaray audio system. Bose places 34 small speakers strategically through the cabin, and uses a processor from its high-end home-entertainment systems for crisp highs, deep bass and seemingly limitless volume.

ACTIVE CHASSIS PACKAGE
Cadillac’s Magnetic Ride Control is already a yardstick for other active-suspension technologies, yet by combining it with the on-demand all-wheel-drive system and 4-wheel steering, the Active Chassis Package offered on V6-powered trims and standard on the Platinum Hybrid takes the stability game to a whole new level.

Standard Features

The lowest-end 2018 Cadillac CT6 comes with an excellent 2.0-liter 4-cylinder engine driving the rear wheels. It also comes with leather upholstery, wood trim, and 14-way-power front seats. The newest version of Cadillac’s CUE infotainment system includes Bose audio, active noise cancellation and OnStar with 4G LTE. Move up to the Luxury/Premium Luxury models and you’ll add enhancements like better leather, surround-sound audio, a wide-angle screen that replaces the rearview mirror, concierge lighting and a hands-free power trunk. The top-end Platinum models include the Bose Panaray audio system, Night Vision, digital instrumentation, quad-zone climate control, and Active Chassis with 4-wheel steering.

Factory Options

In addition to the 3.6-liter V6 engine and AWD, base CT6 buyers can order a Driver Awareness and Convenience Package with active/passive safety features, embedded navigation and a panoramic sunroof. A new Enhanced Entertainment package on Luxury/Premium Luxury models bundles the Bose Panaray audio system and rear-seat package. Other options include the Enhanced Vision and Comfort Package, which adds the rear-camera mirror, panoramic sunroof, ventilated front seats/heated rear seats, and the Active Chassis Package. A Driver Assistance package for the Premium Luxury model adds adaptive cruise, front and rear auto-braking, and infrared night vision. The CT6 Platinum just gets everything.

Engine & Transmission

If you want gasoline-only, you have three choices in the 2018 Cadillac CT6, all of which come with an 8-speed automatic transmission. There’s the base 265-horsepower 2.0-liter 4-cylinder in rear-drive only, the 335-horsepower 3.6-liter V6 or the twin-turbo 3.0-liter V6 with 404 horsepower. Both V6 models are available with all-wheel drive. New this year is a hybrid powertrain that uses the 2.0-liter 4-cylinder plus a pair of 100-horsepower electric motors for a peak output of 335 horsepower and 432 lb-ft of torque. Premium fuel is preferred by the turbo-4 and required by the force-fed six.

2.0-liter turbocharged inline-4
265 horsepower @ 5,500 rpm
295 lb-ft of torque @ 3,000-4,500 rpm
EPA city/highway fuel economy: 22/30 mpg

3.6-liter V6
335 horsepower @ 6,800 rpm
284 lb-ft of torque @ 5,300 rpm
EPA city/highway fuel economy: 18/27 mpg

3.0-liter twin-turbocharged V6
404 horsepower @ 5,700 rpm
400 lb-ft of torque @ 2,500-5,100 rpm
EPA city/highway fuel economy: 18/26 mpg

2.0-liter turbocharged inline-4 + AC Dual motor/generator (plug-in hybrid)
335 horsepower (combined)
432 lb-ft of torque (combined)
Estimated full-charge range: 30 miles (electric only), 400 miles (hybrid total)
EPA city/highway fuel economy: N/A


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2018 Cadillac CT6
KBB.com Consumer Reviews

4.3
Consumer Rating
Based on 33 Consumer Reviews
Write a Review
80%Recommend this vehicle
5
67%
5
67%
4
15%
4
15%
3
3%
3
3%
2
9%
2
9%
1
6%
1
6%
Value
4.2
Performance
4.3
Quality
4.2
Comfort
4.6
Reliability
4.2
Styling
4.8

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2018 Cadillac CT6 Styles

Style
Price
Combined Fuel Economy
Horsepower
Engine
Cargo Capacity
Torque
Curb Weight
2.0 Turbo Sedan 4D
$19,035
25 MPG
265 @ 5500 RPM
4-Cyl, Turbo, 2.0 Liter
15.3 cu ft
295 lb-ft
3666 lbs
3.6 Sedan 4D
$20,528
21 MPG
335 @ 6800 RPM
V6, 3.6 Liter
15.3 cu ft
284 lb-ft
3950 lbs
2.0 Turbo Luxury Sedan 4D
$21,867
25 MPG
265 @ 5500 RPM
4-Cyl, Turbo, 2.0 Liter
15.3 cu ft
295 lb-ft
3702 lbs
3.6 Luxury Sedan 4D
$22,217
21 MPG
335 @ 6800 RPM
V6, 3.6 Liter
15.3 cu ft
284 lb-ft
3982 lbs
3.6 Premium Luxury Sedan 4D
$23,039
21 MPG
335 @ 6800 RPM
V6, 3.6 Liter
15.3 cu ft
284 lb-ft
4057 lbs
3.0 Twin Turbo Premium Luxury Sedan 4D
$23,446
21 MPG
404 @ 5700 RPM
V6, Twin Turbo, 3.0 Liter
15.3 cu ft
400 lb-ft
4176 lbs
PLUG-IN Sedan 4D
$25,043
25 MPG
265 @ 5600 RPM
4-Cyl, Hybrid, Turbo, 2.0 Liter
10.6 cu ft
295 lb-ft
4537 lbs
3.0 Twin Turbo Luxury Sedan 4D
$25,927
21 MPG
404 @ 5700 RPM
V6, Twin Turbo, 3.0 Liter
15.3 cu ft
400 lb-ft
4099 lbs
3.0 Twin Turbo Platinum Sedan 4D
$27,959
21 MPG
404 @ 5700 RPM
V6, Twin Turbo, 3.0 Liter
15.3 cu ft
400 lb-ft
4399 lbs
3.6 Platinum Sedan 4D
$30,195
21 MPG
335 @ 6800 RPM
V6, 3.6 Liter
15.3 cu ft
284 lb-ft
4280 lbs
See Full Specs for All 2018 Cadillac CT6 Styles
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2018 Cadillac CT6 Depreciation

A 2018 Cadillac CT6 has depreciated $13,423 or 45% in the last 3 years and has a current resale value of $15,898 and trade-in value of $13,022.

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2018 Cadillac CT6
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2018 Cadillac CT6 Annual Depreciation

Year
Vehicle Depreciation*
Resale Value
Trade-In Value
2022
$2,874
$29,321
$26,589
2023
$3,557
$25,764
$22,254
2024
$4,487
$21,277
$17,928
Now
$5,379
$15,898
$13,022
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2-Year Forecasted Depreciation

*Depreciation for the last 12 months of the private party resale value.

2018 Cadillac CT6 Depreciation

Annual Depreciation is an estimation of what your vehicle's value might be over time based on an average of similar vehicles. Estimations are calculated by comparing Kelley Blue Book Private Party Values of vehicles similar to yours over time, as well as forecasts from Manheim Auction data comparing current and projected auction values against current Kelley Blue Book Private Party and Trade-In Values. This is not a guarantee of actual depreciation. Local weather conditions, market factors and driver performance will also impact your vehicle's actual depreciation.


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Specifications

Dimensions, Weights & Capacities

Curb Weight
3666 lbs.
Fuel Capacity
19.5 gallons
Front Head Room
40.2 inches
Front Leg Room
46.4 inches
Max Seating Capacity
5
Overall Length
204.1 inches
Front Shoulder Room
58.3 inches
Towing Capacity, Maximum
1000 lbs.
Trunk or Cargo Capacity
15.3 cu.ft.
Wheel Base
122.4 inches
Gross Vehicle Weight Rating (GVWR)
4790 lbs.

Exterior

Alloy Wheels
Available
Moon Roof/Sun Roof
Available
Number of Doors
4 doors
Panorama Moon Roof
Available
Power Folding Exterior Mirrors
Available
LED Headlights
Available
Rear Spoiler
Available

Fuel Economy

City
22 mpg
Highway
30 mpg
Combined
25 mpg

Mechanical

Drivetrain
RWD
Transmission Type
Automatic
8 speed
Available
Recommended Fuel
Premium
Parking Assist System
Available

Performance

Horsepower
265 @ 5500 RPM
Torque
295 @ 3000 rpm
Engine
4-Cyl, Turbo, 2.0 Liter

Warranty

Basic
4 years / 50000 miles
Powertrain
6 years / 70000 miles
Corrosion
6 years / Unlimited miles

Comfort & Convenience

  • Integrated Garage Door Opener

Entertainment

  • Satellite Radio
  • Bluetooth Streaming Audio

Interior

  • Leather-Wrapped Steering Wheel
  • Power Windows
  • Power Outlet
  • Tilt Steering Wheel
  • Tilt/Telescoping Steering Wheel

Seating

  • Leather Seats
  • Heated Seats
  • Dual Power Front Seats
  • Power Driver's Seat

Technology

  • Bluetooth Wireless Technology
  • Cruise Control
  • Hands Free Phone
  • Navigation System
  • Remote Keyless Entry
  • Internet Access
  • Remote Engine Start
  • Smartphone Interface
  • Touch Screen Monitor
  • USB Port
  • Voice Recognition System

2018 Cadillac CT6 Safety

2018 Cadillac CT6 Safety Technology

  • Child Door Locks
  • Child Seat Anchors
  • Driver Airbag
  • Passenger Airbag
  • Blind-Spot Alert
  • Collision Warning System
  • Driver Knee Airbag
  • Emergency & Security Services
  • Front & Rear Parking Sensors
  • Front Head Curtain Airbag
  • Front Knee Airbag
  • Front Side Airbag
  • Lane Departure Warning System
  • Parental Control System
  • Rear Parking Sensors
  • Rear View Camera

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See Details
Price
$19,035
$17,208
$19,663
$17,550
KBB.com Rating
4.2
3.9
4.0
3.8
Consumer Rating
4.3
4.5
4.5
4.8
Fuel Economy
City 22/Hwy 30/Comb 25 MPG
City 25/Hwy 35/Comb 29 MPG
City 20/Hwy 29/Comb 23 MPG
City 17/Hwy 26/Comb 20 MPG
Fuel Type
Gas
N/A
N/A
N/A
Safety Rating
N/A
5.0
5.0
5.0
Seating Capacity5555
Basic Warranty
4 years or 50000 miles
4 years or 50000 miles
4 years or 50000 miles
4 years or 50000 miles
Horsepower
265 @ 5500 RPM
194 @ 6300 RPM
310 @ 6500 RPM
305 @ 6500 RPM
Engine
4-Cyl, Turbo, 2.0 Liter
4-Cyl, eAssist, 2.5 Liter
V6, i-VTEC, 3.5 Liter
V6, 3.7 Liter
Drivetrain
RWD
FWD
FWD
FWD

2018 Cadillac CT6 Rankings

More Cadillac CT6 News & Information

General
Last Call: 12 Discontinued Cars in 2020

Matt DeLorenzo September 14, 2020
Luxury Car
2019 Cadillac CT6 V-Sport Launched

V-Sport line expands to include CT6 version Powered by a 550-horsepower, 4.2-liter twin-turbo V8 Comes with summer performance tires, rear…

Melissa Burden March 22, 2018
Electric Vehicle
2017 Cadillac CT6 Plug-in Hybrid First Look

If Tesla has taught us anything, it’s that green technology must be as much a part of the luxury car…

Keith Buglewicz November 21, 2016

FAQs

Is the 2018 Cadillac CT6 a good vehicle?

Yes, the 2018 Cadillac CT6 is a good car. Its Kelley Blue Book rating of 4.2 out of 5 is within 10% of our average rating.

How much should a 2018 Cadillac CT6 cost?

Used 2018 Cadillac CT6 prices currently range from $19,035 for the 2.0 Turbo Sedan 4D to $30,195 for the 3.6 Platinum Sedan 4D when purchasing from a dealership, depending on a range of factors like equipment, mileage, and condition.

What's the cheapest Cadillac CT6?

The cheapest 2018 Cadillac CT6 is the 2.0 Turbo Sedan 4D, with a Kelley Blue Book Fair Purchase Price of $19,035.

Is the 2018 Cadillac CT6 reliable?

The 2018 Cadillac CT6 is part of the 1st-generation CT6, which our owners give an above-average reliability rating of 4.2 out of 5.

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