Used 2020 Cadillac CT6 for Sale near Illinois
Shop with transparent pricing.
Only show listings that include dealer fees- Year:
- 2020
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Black
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 110,447
- Stock #:
- JYC-107095
- VIN:
- 1G6KB5RS5LU107095
Sponsored by Your Choice Autos - Joliet
2020 Cadillac CT6
3.6L Luxury AWD
110,447 mi
$24,876
- Year:
- 2019
- 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:
- Dark Auburn with Jet Black accents
- Transmission:
- Automatic
- Mileage:
- 98,099
- Stock #:
- 2U330B
- VIN:
- 1G6KN5R64KU118436
Sponsored Listing
2019 Cadillac CT6
3.0TT Sport AWD
98,099 mi
$25,404
- Year:
- 2020
- 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:
- 75,350
- Stock #:
- GX5676
- VIN:
- 1G6KB5RS9LU111652
Sponsored Listing
2020 Cadillac CT6
3.6L Luxury AWD
75,350 mi
$29,311
- Year:
- 2020
- 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:
- 75,350
- Stock #:
- GX5676
- VIN:
- 1G6KB5RS9LU111652
2020 Cadillac CT6
3.6L Luxury AWD
75,350 mi
$29,311
- Year:
- 2020
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Stellar Black Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Brown (Sahara Beige with Jet Black accents)
- Transmission:
- Automatic
- Mileage:
- 18,092
- Stock #:
- AS20182
- VIN:
- 1G6KB5RS9LU101025
2020 Cadillac CT6
3.6L Luxury AWD
18,092 mi
$39,912
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Gray (Steel Metallic)
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 97,163
- Stock #:
- 2869
- VIN:
- 1G6KP5R6XKU138362
2019 Cadillac CT6
3.0TT Sport AWD
97,163 mi
$26,656
- Year:
- 2019
- 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:
- Dark Auburn with Jet Black accents
- Transmission:
- Automatic
- Mileage:
- 98,099
- Stock #:
- 2U330B
- VIN:
- 1G6KN5R64KU118436
2019 Cadillac CT6
3.0TT Sport AWD
98,099 mi
$25,404
- Year:
- 2019
- 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:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 131,238
- Stock #:
- 132868
- VIN:
- 1G6KD5RS4KU132868
2019 Cadillac CT6
3.6L Premium Luxury AWD
131,238 mi
$21,372
- Year:
- 2019
- 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:
- 58,130
- Stock #:
- 70150824
- VIN:
- 1G6KB5RS2KU130929
2019 Cadillac CT6
3.6L Luxury AWD
58,130 mi
$31,147
- Year:
- 2020
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Black
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 110,447
- Stock #:
- JYC-107095
- VIN:
- 1G6KB5RS5LU107095
2020 Cadillac CT6
3.6L Luxury AWD
110,447 mi
$24,876
- Year:
- 2019
- 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:
- 147,549
- Stock #:
- 117457
- VIN:
- 1G6KB5RSXKU117457
2019 Cadillac CT6
3.6L Luxury AWD
147,549 mi
$19,405
- Year:
- 2020
- 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:
- 47,508
- Stock #:
- 19783
- VIN:
- 1G6KE5RS1LU100801
2020 Cadillac CT6
3.6L Premium Luxury AWD
47,508 mi
$40,385
- Year:
- 2020
- 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:
- 145,499
- Stock #:
- V626055
- VIN:
- 1G6KB5RS7LU111889
2020 Cadillac CT6
3.6L Luxury AWD
145,499 mi
$22,574
About 2020 Cadillac CT6
- 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:
- 78,373
- Stock #:
- 132371
- VIN:
- 1G6KD5RS6KU132371
2019 Cadillac CT6
3.6L Premium Luxury AWD
78,373 mi
$31,014
- Year:
- 2020
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Black Raven (gba)
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Dark Auburn W/Jet Black Accents (htx)
- Transmission:
- Automatic
- Mileage:
- 74,019
- Stock #:
- 100267
- VIN:
- 1G6KE5RS7LU100267
2020 Cadillac CT6
3.6L Premium Luxury AWD
74,019 mi
$35,045
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 404 hp 3L V6
- Exterior color:
- Gray (Satin Steel Metallic)
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 102,499
- Stock #:
- 28531C
- VIN:
- 1G6KP5R60KU134496
2019 Cadillac CT6
3.0TT Sport AWD
102,499 mi
No Price Listed
- Year:
- 2020
- 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:
- Brown (Sahara Beige With Jet Black Accents)
- Transmission:
- Automatic
- Mileage:
- 128,832
- Stock #:
- 25296
- VIN:
- 1G6KE5RS1LU104881
2020 Cadillac CT6
3.6L Premium Luxury AWD
128,832 mi
$29,561
- Year:
- 2019
- 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:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 70,122
- Stock #:
- U2222
- VIN:
- 1G6KB5RS7KU119053
Photos coming soon
2019 Cadillac CT6
3.6L Luxury AWD
70,122 mi
$30,880
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- All-Wheel Drive
- Engine:
- 335 hp 3.6L V6
- Exterior color:
- Stellar Black Metallic
- Combined gas mileage:
- 22 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 34,294
- Stock #:
- 28589C
- VIN:
- 1G6KB5RS3KU136156
2019 Cadillac CT6
3.6L Luxury AWD
34,294 mi
$38,526
- Year:
- 2019
- Make:
- Cadillac
- Model:
- CT6
- Body type:
- Sedan
- Doors:
- 4 doors
- Drivetrain:
- Rear-Wheel Drive
- Engine:
- 237 hp 2L I4
- Exterior color:
- Black
- Combined gas mileage:
- 29 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 53,621
- Stock #:
- 19904
- VIN:
- 1G6KA5RK8KU115144
2019 Cadillac CT6
2.0T Luxury RWD
53,621 mi
$32,385
Overview
The Cadillac CT6 is the brand’s largest and poshest sedan, competing with the Lincoln Continental, Acura RLX, BMW 5 Series, and Volvo S90. For 2020, it soldiers on with minor updates.
Sometime last year, the base 4-cylinder engine disappeared from the lineup. That leaves a 3.6-liter V6 as the new base engine, making 335 horsepower and 284 pound-feet of torque. Also gone is last year’s twin-turbocharged V6. In its stead is a more potent twin-turbocharged 4.2 liter V8 that measures 500 hp and 574 lb-ft. Both engines hook up to a 10-speed automatic transmission and standard all-wheel drive (AWD). Even the standard suspension setup is composed, but Cadillac offers a magnetic ride setup and active rear steering above that.
This year, the CT6 comes in Luxury, Premium Luxury, and Platinum grades. The Luxury includes 19-inch alloy wheels, LED exterior lighting, a panoramic power sunroof, heated front seats, heated outside mirrors, keyless access and start, 14-way power seats, memory settings, dual-zone automatic climate control, leather upholstery, an 8-inch instrument cluster LCD, a 10.2-inch infotainment system with Apple CarPlay and Android Auto connectivity, and 4G LTE hotspot capability. Features on higher trims consist of a 12-inch instrument cluster LCD, ventilated front seats, heated rear outboard seats, backseat entertainment screens, 4-zone climate control, 20-inch wheels, a rear spoiler, and a Bose Panaray system with 34 speakers.
As befitting a vehicle of its stature, the CT6 comes with an excellent array of standard and optional safety features. Every model gets forward-collision warning, automatic emergency braking, a safety-alert seat, a following-distance indicator, lane-keeping assist, lane-departure warning, rear cross-traffic alert, and blind-spot monitoring. Adaptive cruise control, enhanced automatic emergency braking, reverse automatic braking, night vision, and Super Cruise come standard on Premium Luxury and above trims. Super Cruise is a semi-autonomous driving function that works on certain divided-access highways. No major agency has crash-tested the CT6, but that’s pretty normal for large luxury sedans.
*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.
4.0 Overall rating
Filter by rating
Jim C
Reviewed a 2020 Cadillac CT6 on Apr 9, 2024
The last full size luxury Cadillac production. Excellent
Samuel C
Reviewed a 2020 Cadillac CT6 on Apr 5, 2024
A very responsive, well equipped, full size sedan. GM got it right, and canceled a winner.
Jerry L
Reviewed a 2020 Cadillac CT6 on Sep 3, 2023
Average standard features. Highly over priced. Missing comfort.
Maurice H
Reviewed a 2020 Cadillac CT6 on Feb 27, 2023
Its a great car. Im still learning all the features. The ride is great. Its only been a day but Im very satisfied so far. I cant believe Cadillac stopped making it.
2020 Cadillac CT6 Trims
| Trim type | MSRP |
|---|---|
| 3.6L Premium Luxury AWD | $74,495 |
| 4.2TT Platinum AWD | $96,495 |
| 3.6L Luxury AWD | $58,995 |
*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.
2020 Cadillac CT6 Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2020 Cadillac CT6 prices has changed over time.
See more price trends2020 Cadillac CT6 Pricing Analysis
Pricing by Popular US Cities
Market Area: Nationwide
Key Insights
- Highest Price in New York: The New York, NY market commands the highest average price at $47,995, likely due to higher demand for luxury vehicles in urban settings.
- Lowest Price in 2016 Models: The 2016 Cadillac CT6 shows the lowest average price at $18,676, indicating significant depreciation for older models.
- Price Variation Across Cities: Markets like Chicago, IL ($30,912) and Philadelphia, PA ($43,099) reflect a diverse pricing landscape, suggesting varying demand and inventory levels.
City-Level Pricing
| City | Total Listings | Avg Price |
|---|---|---|
| New York, NY | 14 | $47,995 |
| Philadelphia, PA | 14 | $43,099 |
| Houston, TX | 12 | $38,000 |
| Boston, MA | 11 | $34,995 |
| Chicago, IL | 17 | $30,912 |
Pricing Analysis by Model Year
Key Insights
- Significant Depreciation: The 2019 Cadillac CT6 has experienced a depreciation of ~45.0% from its original MSRP, reflecting the steep decline typical for luxury vehicles.
- Best Value in 2018 Models: The 2018 model offers a balance of price and features, with an average price of $23,499, down ~56.7% from MSRP.
- Older Models Show Steeper Declines: The 2016 model is priced at $18,676, indicating a ~65.1% depreciation, which is substantial for a luxury sedan.
Model Year Pricing
| Model Year | Original MSRP | Avg Price | Price vs MSRP |
|---|---|---|---|
| 2019 Cadillac CT6 | $50,495 | $27,838 | -45.0% |
| 2018 Cadillac CT6 | $54,095 | $23,499 | -56.7% |
| 2017 Cadillac CT6 | $53,795 | $19,507 | -63.7% |
| 2016 Cadillac CT6 | $53,495 | $18,676 | -65.1% |
These recommendations are based on CarGurus' proprietary market data from September 3, 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.
Is the 2020 Cadillac CT6 a good car?
Generally — you’re looking at a 4/5 user-rated car, which points to solid shopper satisfaction for this model year. That rating suggests the 2020 Cadillac CT6 is a reasonable choice if you want a used luxury sedan and the specific listing checks out on condition and history. 26.5% of listings are marked as good or great deals, so you do have some room to shop selectively.
Is the 2020 Cadillac CT6 reliable?
Owners rate it 4/5, a solid signal of long-term satisfaction. That kind of owner feedback suggests the 2020 Cadillac CT6 can be a sensible used buy if you prioritize a car with generally positive ownership experience. For long-term ownership, your biggest risk is buying a poorly maintained example, so condition and service history matter a lot.
What should I look for when buying a used 2020 Cadillac CT6?
At 65.1% accident-free, a meaningful share of listings has prior incidents — history verification is especially important. You should run a vehicle history report before you commit, then prioritize a pre-purchase inspection so you can catch hidden bodywork, repair quality issues, or wear that photos may not show. Focus especially on overall condition, since a clean-looking listing is not the same thing as a clean-history car.
Is now a good time to buy a used 2020 Cadillac CT6?
This looks like a moderate, selective buyer’s market, so you can shop with some leverage if you’re patient and compare listings carefully.
- Deal availability: 26.5% of listings are priced as good or great deals.
- Inventory: There are 83 listings available.
- Clean inventory: 65.1% of listings are accident-free.
If you find a listing below $33,284, that's toward the low end of the year-round range and worth acting on quickly.
Should I buy a 2020 Cadillac CT6 or consider a different year?
If you're weighing the 2020 against nearby model years, here's how to think about it:
Choose the 2020 if:
- 26.5% of listings are priced as good or great deals.
- At 65.1% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
- Owners rate it 4/5 — a solid satisfaction signal.
The bottom line: The 2020 Cadillac CT6 makes sense if you want this model year and can focus on the cleaner, better-priced listings. If you’re price-sensitive, keep comparing individual cars closely and be ready to move on a well-priced example with strong history and condition.
These recommendations are based on CarGurus' proprietary market data from August 28, 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.
