Used 2018 Cadillac CT6 for SaleNationwide
Shop with transparent pricing.
Only show listings that include dealer fees- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 237 hp 2L I4
- Exterior color:
- Radiant Silver Metallic
- Combined gas mileage:
- 29 MPG
- Fuel type:
- Gasoline
- Interior color:
- Brown (Sahara Beige)
- Transmission:
- Automatic
- Mileage:
- 29,656
- Stock #:
- T107649
- VIN:
- 1G6KA5RK9KU107649

-$704
2019 Cadillac CT6
2.0T Luxury RWD
29,656 mi
$28,690
$27,986
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Black
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray
- Transmission:
- Automatic
- Mileage:
- 116,379
- Stock #:
- P8806A
- VIN:
- 1G6KN5R69HU202342

2017 Cadillac CT6
3.0TT Platinum AWD
116,379 mi
$19,155
- Year:
- 2018
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Gray (Steel Metallic)
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray (Light Platinum With Jet Black Accents)
- Transmission:
- Automatic
- Mileage:
- 66,694
- Stock #:
- PAW275
- VIN:
- 1G6KG5RS3JU126016

2018 Cadillac CT6
3.6L Premium Luxury AWD
66,694 mi
$27,416
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Green
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Transmission:
- 8-Speed Automatic
- Mileage:
- 79,831
- Stock #:
- N33896
- VIN:
- 1G6KF5RS9HU200214

2017 Cadillac CT6
3.6L Premium Luxury AWD
79,831 mi
$25,275
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Silver
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Brown (Beige)
- Transmission:
- 8-Speed Automatic
- Mileage:
- 90,259
- Stock #:
- 1354
- VIN:
- 1G6KB5RS7HU124679

2017 Cadillac CT6
3.6L AWD
90,259 mi
$18,220
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Black Raven
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 130,253
- VIN:
- 1G6KN5R65HU125632

2017 Cadillac CT6
3.0TT Platinum AWD
130,253 mi
$20,099
- Year:
- 2018
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Crystal White Tricoat
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray (Light Platinum with)
- Transmission:
- Automatic
- Mileage:
- 69,955
- Stock #:
- JE323
- VIN:
- 1G6KG5RS7JU127833

2018 Cadillac CT6
3.6L Premium Luxury AWD
69,955 mi
$25,694
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Manhattan Noir Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 79,124
- Stock #:
- 135542
- VIN:
- 1G6KD5RS6KU140664

2019 Cadillac CT6
3.6L Premium Luxury AWD
79,124 mi
$28,438
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Blue
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Brown (Tan)
- Transmission:
- 8-Speed Automatic
- Mileage:
- 71,134
- Stock #:
- P02-139772-K43
- VIN:
- 1G6KH5R64HU139772

2017 Cadillac CT6
3.0TT Premium Luxury AWD
71,134 mi
$20,554
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Crystal White Tricoat
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Cinnamon With Jet Black Accents
- Transmission:
- 8-Speed Automatic
- Mileage:
- 65,059
- Stock #:
- JR144696
- VIN:
- 1G6KE5R65HU144696

2017 Cadillac CT6
3.0TT Luxury AWD
65,059 mi
$20,393
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Black Raven
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 62,000
- Stock #:
- OSB050
- VIN:
- 1G6KD5RS6KU139322

-$2,007
2019 Cadillac CT6
3.6L Premium Luxury AWD
62,000 mi
$31,794
$29,787
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Radiant Silver Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray (Light Platinum)
- Transmission:
- 8-Speed Automatic
- Mileage:
- 90,569
- Stock #:
- P9432A
- VIN:
- 1G6KD5RS7HU159250

2017 Cadillac CT6
3.6L Luxury AWD
90,569 mi
$20,000
- Year:
- 2018
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Gray
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 76,766
- Stock #:
- 8936
- VIN:
- 1G6KG5RS1JU120313

2018 Cadillac CT6
3.6L Premium Luxury AWD
76,766 mi
$27,031
About 2018 Cadillac CT6
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Radiant Silver Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 107,006
- Stock #:
- HM7934
- VIN:
- 1G6KE5R64HU207934

2017 Cadillac CT6
3.0TT Luxury AWD
107,006 mi
$17,224
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Radiant Silver Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray (Light Platinum w/Jet Black Accents)
- Transmission:
- 8-Speed Automatic
- Mileage:
- 32,591
- Stock #:
- M192968
- VIN:
- 1G6KF5RS7HU192968

2017 Cadillac CT6
3.6L Premium Luxury AWD
32,591 mi
$26,485
- Year:
- 2018
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Stellar Black Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Very Light Cashmere With Maple Sugar Accents
- Transmission:
- 8-Speed Automatic
- Mileage:
- 84,650
- Stock #:
- 261433C
- VIN:
- 1G6KP5R6XJU103741

2018 Cadillac CT6
3.0TT Platinum AWD
84,650 mi
$28,064
- Year:
- 2018
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Stellar Black Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 37,504
- Stock #:
- P1769
- VIN:
- 1G6KP5R63JU133762

2018 Cadillac CT6
3.0TT Platinum AWD
37,504 mi
$31,615
- Year:
- 2018
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Gray (Satin Steel Metallic)
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 107,082
- Stock #:
- 155499
- VIN:
- 1G6KD5RS7JU102116

2018 Cadillac CT6
3.6L Luxury AWD
107,082 mi
$20,326
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Manhattan Noir Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Dark Auburn With Jet Black Accents
- Transmission:
- Automatic
- Mileage:
- 133,460
- Stock #:
- P9744A
- VIN:
- 1G6KD5RS7KU141337

-$5,262
2019 Cadillac CT6
3.6L Premium Luxury AWD
133,460 mi
$25,368
$20,106
- Year:
- 2018
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Crystal White Tricoat
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 61,935
- Stock #:
- W4026
- VIN:
- 1G6KP5R67JU158311

2018 Cadillac CT6
3.0TT Platinum AWD
61,935 mi
$31,710
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Black Raven
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 48,015
- Stock #:
- 2F26029B
- VIN:
- 1G6KD5RS1KU125358

2019 Cadillac CT6
3.6L Premium Luxury AWD
48,015 mi
$34,257
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Crystal White Tricoat
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Very Light Cashmere With Maple Sugar Accents
- Transmission:
- 8-Speed Automatic
- Mileage:
- 85,555
- Stock #:
- MU204791
- VIN:
- 1G6KN5R64HU204791

2017 Cadillac CT6
3.0TT Platinum AWD
85,555 mi
$24,959
- Year:
- 2017
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Crystal White Tricoat
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Cinnamon with Jet Black Accents
- Transmission:
- Automatic
- Mileage:
- 87,726
- Stock #:
- 3559
- VIN:
- 1G6KD5RS4HU172229

2017 Cadillac CT6
3.6L Luxury AWD
87,726 mi
$21,625
Overview

Cadillac hasn’t had a true flagship sedan in many years, but that changed in 2016 with the introduction of the CT6. The model has been given the very ambitious task of luring buyers away from the other big luxury sedans, and for 2018, Cadillac is upping the ante with a few new features that should make the CT6 an even more compelling alternative.
The big news for 2018 is the addition of the all-new Super Cruise system to the CT6’s options list. Super Cruise is a semi-autonomous driving system similar to Tesla’s Autopilot that enables the vehicle to drive itself on the highway by using a suite of cameras, sensors, and GPS data. Super Cruise stands out from other semi-autonomous systems in a couple of ways—first of all, it uses LiDAR-based mapping data, which gives the system a more comprehensive idea of the road ahead and helps determine whether or not Super Cruise can be activated. Second, it includes a driver-attention system with a camera and infrared lights that monitor the position and movement of the driver’s head. If the driver turns away from the road, the system will issue an alert through a light bar on the steering wheel and send vibrations through the seat. If the driver fails to react, Super Cruise can bring the vehicle to a stop.
The CT6 differs from other Cadillac models in its design. Its exterior does feature Cadillac’s signature sharp lines and angles, but these have been toned down considerably in comparison to the likes of the ATS or CTS. Depending on the trim, the CT6 offers various grille inserts and wheels ranging in size from 18 to 20 inches. Despite its positioning as a flagship sedan, the CT6 comes up somewhat short in terms of length—it stands at just 204.1 inches, placing it between the BMW 5 and 7 Series.
Cadillac has put a lot of effort into making the CT6’s interior look and feel like a proper luxury car. Materials range from real wood and aluminum trim to leather upholstering the seats. The base trim comes with power adjustments for the front seats and memory settings for the driver, while higher trims get heated and ventilated front seats, a heated steering wheel, and heated rear seats. The backseat is quite spacious, with plenty of head- and legroom, although trunk capacity is below the class average at 15.3 cubic feet.
All CT6s come standard with the Cadillac User Experience (CUE) infotainment system and a 10.2-inch touchscreen. Once a major point of criticism, Cadillac has continued to improve CUE over the years with tweaks to the interface, hardware updates, and the addition of key features such as Apple CarPlay and Android Auto. The touchscreen comes with a separate touchpad controller, which some reviewers have noted is a bit too sensitive to accurately select items on the screen. Other standard technology features include OnStar’s concierge service, turn-by-turn directions, and OnStar 4G LTE with Wi-Fi.
Flagship sedans typically offer a wide range of powertrain options, and in this the CT6 delivers. The base engine is a turbocharged 2.0-liter 4-cylinder offering 265 hp and 295 lb-ft of torque. Up next is a 3.6-liter V6 good for 335 hp and 284 lb-ft, and topping the lineup is a twin-turbo 3.0-liter V6 with 404 hp and 400 lb-ft. All powertrains come standard with an 8-speed automatic transmission, and fuel economy ranges from 18 mpg city, 26 highway, and 21 combined for the twin-turbo V6 to 22, 31, and 25 for the 2.0-liter engine. The 2.0-liter gets rear-wheel drive (RWD), while both V6s are paired with an all-wheel-drive (AWD) system. Those wanting to go green can opt for the separate CT6 PLUG-IN model, which combines the turbo 2.0-liter with an electric motor for a total output of 335 hp.
Calling the Cadillac CT6 fun to drive may seem like a misnomer due to its size, but it stands as one of the sharpest-handling vehicles in the class. This is in large part thanks to its aluminum frame, which helps cut down on overall weight. An optional Active Chassis package adds GM’s excellent Magnetic Ride Control system, which uses special fluid in the shocks to keep the vehicle flat when cornering and smooth out bumps, and rear-wheel steering for better balance.
As for safety features, all CT6s come with a full set of airbags, traction and stability control, a reversing camera, and OnStar emergency services. Higher trims are equipped with blind-spot monitoring with rear cross-traffic alert, lane-departure warning, lane-keep assist, forward-collision alert, low-speed forward automatic braking, automatic pedestrian braking, and Cadillac’s Rear Camera Mirror that projects the reversing camera display onto the rear-view mirror.
Pricing for the 2018 Cadillac CT6 begins at $54,095.
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
4.7 Overall rating
Filter by rating
James M
Reviewed a 2018 Cadillac CT6 on Oct 22, 2024
Love this car. Best car ive owned. All i want is a cadillac going forward
Marina R. V
Reviewed a 2018 Cadillac CT6 on Feb 28, 2025
This vehicle has every bell and whistle that you can imagine. The price was absolutely amazing and I couldn't have found a better deal.
Robert H T
Reviewed a 2018 Cadillac CT6 on May 10, 2022
This is my favorite car and for the money you cannot beat its price to options available. love the car.
Anonymous
Reviewed a 2018 Cadillac CT6 on Mar 16, 2021
This is a beautiful car inside and out. The ride is very smooth, nice handling, luxury and power all in one. The technology is second to none. When you see this car parked or in motion, all you can say is thats a sharp ride.
2018 Cadillac CT6 Trims
| Trim type | MSRP |
|---|---|
| 3.0TT Luxury AWD | $65,195 |
| 2.0T Luxury RWD | $59,195 |
| 2.0T RWD | $54,095 |
| 3.6L AWD | $56,095 |
| 3.0TT Premium Luxury AWD | $69,295 |
| 3.0TT Platinum AWD | $88,295 |
| 3.6L Premium Luxury AWD | $65,295 |
| 3.6L Luxury AWD | $61,195 |
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
2018 Cadillac CT6 Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2018 Cadillac CT6 prices has changed over time.
See more price trends2018 Cadillac CT6 Pricing Analysis
Pricing by Popular US Cities
Market Area: Nationwide
Key Insights
- Lowest Prices in New York: The market in New York, NY ($15,799) offers the most affordable options, likely due to higher inventory levels and demand for budget-friendly vehicles.
- Highest Prices in Philadelphia: In contrast, Philadelphia, PA ($31,995) has the highest average price, indicating a premium market or lower inventory.
- Inventory Variation: Cities like Chicago (37 listings) and Dallas (34 listings) show a balance of inventory and pricing, with average prices around $24,444 to $24,625, suggesting stable demand.
City-Level Pricing
| City | Total Listings | Avg Price |
|---|---|---|
| Philadelphia, PA | 30 | $31,995 |
| Chicago, IL | 37 | $24,625 |
| Dallas, TX | 34 | $24,444 |
| Los Angeles, CA | 21 | $23,106 |
| Miami, FL | 22 | $22,999 |
| Washington, DC | 32 | $25,960 |
| Boston, MA | 30 | $24,054 |
| Atlanta, GA | 31 | $15,952 |
| New York, NY | 33 | $15,799 |
Pricing by Trim Packages
Key Insights
- Most Common Trim: The 3.6L Luxury AWD is the most prevalent trim with 116 listings, indicating strong demand for this configuration.
- Price Range Across Trims: The trims range from $56,095 for the 3.6L AWD to $88,295 for the 3.0TT Platinum AWD, highlighting a significant price spread based on features and drivetrain.
- AWD Popularity: All listed trims are AWD, reflecting a market preference for all-weather capability, which may drive higher prices.
Trim-Level Details
| Trim | Listings | MSRP | Drivetrain | Engine |
|---|---|---|---|---|
| 3.6L Luxury AWD | 116 | $61,195 | AWD | 3.6L 335 hp V6 |
| 3.6L Premium Luxury AWD | 90 | $65,295 | AWD | 3.6L 335 hp V6 |
| 3.0TT Platinum AWD | 35 | $88,295 | AWD | 3.0L 404 hp V6 |
| 3.0TT Premium Luxury AWD | 20 | $69,295 | AWD | 3.0L 404 hp V6 |
| 3.6L AWD | 15 | $56,095 | AWD | 3.6L 335 hp V6 |
| 3.0TT Luxury AWD | 13 | $65,195 | AWD | 3.0L 404 hp V6 |
| 2.0T Luxury RWD | 13 | $59,195 | RWD | 2.0L 265 hp I4 |
| 3.6L Platinum AWD | 9 | $84,295 | AWD | 3.6L 335 hp V6 |
Pricing Analysis by Model Year
Key Insights
- Significant Depreciation: The 2017 Cadillac CT6 shows a steep decline in value, priced at $18,770, which is ~65.2% below its original MSRP.
- Best Value Year: The 2019 model offers a balance of price and features, with an average price of $27,198, reflecting a ~46.2% depreciation.
- Newer Models Retain Value: The 2020 model is priced at $32,698, indicating a ~44.0% depreciation, suggesting that newer models are still in demand.
Model Year Pricing
| Model Year | Original MSRP | Avg Price | Price vs MSRP |
|---|---|---|---|
| 2020 | $58,995 | $32,698 | -44.0% |
| 2019 | $50,495 | $27,198 | -46.2% |
| 2017 | $53,795 | $18,770 | -65.2% |
| 2016 | $53,495 | $19,005 | -64.5% |
These recommendations are based on CarGurus' proprietary market data from September 16, 2026, CarGurus experts' opinions, and generative AI.
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
How much does the 2018 Cadillac CT6 cost?
| Metric | Value |
|---|---|
| Current Average Price | $23,559 |
| Year-Round Low | $22,949 |
| Year-Round High | $24,540 |
| Average Price a Year Ago | $24,520 |
| Change vs. Last Year | −3.92% |
Prices have softened 3.92% compared to this time last year, making it a favorable time to shop this model year.
There are 242 listings available, which gives you a modest amount of inventory to compare before you buy.
Is the 2018 Cadillac CT6 a good car?
Yes — owners rate it 4.69/5, which points to strong overall satisfaction. Reviewers commonly praise the smooth ride, luxurious interior, powerful performance, advanced technology, and spaciousness. The market also shows 30.6% of listings as good or great deals, which gives you some room to shop selectively.
Is the 2018 Cadillac CT6 reliable?
Owners rate it 4.69/5, a strong signal of long-term satisfaction. In owner feedback, the CT6 is described as smooth, luxurious, and powerful, with several comments pointing to a dependable-feeling ownership experience over time. For used buyers, the main long-term risk is making sure the specific car you choose has been cared for well, since condition can vary meaningfully from one listing to another.
What should I look for when buying a used 2018 Cadillac CT6?
At 60.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
You should start with a vehicle history report and confirm whether any prior damage was repaired properly. A pre-purchase inspection should focus on body condition, alignment, interior wear, and any signs that the car has been used harder than average. Because owner feedback mentions seating comfort, road noise, and rear-seat space concerns, it also makes sense to test those areas carefully during your own drive.
Is now a good time to buy a used 2018 Cadillac CT6?
This is a moderate, selective buyer's market, so you can shop patiently and still find worthwhile options.
- Deal availability: 30.6% of listings are priced as good or great deals.
- Inventory: There are 242 listings available.
- Price trend: Prices have softened 3.92% compared with last year.
- Clean inventory: 60.7% of listings are accident-free.
If you find a listing below $22,949, that's toward the low end of the year-round range and worth acting on quickly.
What is the 2018 Cadillac CT6's resale value?
The current average of $23,559 sits slightly below last year's $24,520.
That price movement suggests the model has softened, which can help you buy at a more favorable entry point today. If you plan to sell later, the current trend means your future resale value will depend heavily on how well you preserve condition and mileage. Strong ownership satisfaction can help support demand when it's time to list.
Vehicles with strong owner satisfaction ratings, like this model year's 4.69/5, tend to retain buyer demand, which supports resale value over time.
Should I buy a 2018 Cadillac CT6 or consider a different year?
If you're weighing the 2018 against nearby model years, here's how to think about it:
Choose the 2018 if:
- 30.6% of listings are priced as good or great deals.
- At 60.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
- Price trend: Prices have softened 3.92% compared with last year.
- Owners rate it 4.69/5 — a strong satisfaction signal.
The bottom line:
If you want a used CT6 with solid owner satisfaction and a softer price trend, the 2018 is a sensible place to start. You should focus on condition, history, and maintenance records first, then compare it against nearby years if you want to prioritize either lower purchase price or a different mix of inventory and value. If you're especially price-sensitive, keep an eye on listings near the low end of the range and move quickly when a clean example appears.
These recommendations are based on CarGurus' proprietary market data from September 15, 2026, CarGurus experts' opinions, and generative AI.
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
