2017 Cadillac CT6 prices in Illinois
The median asking price for a 2017 Cadillac CT6 in Illinois is $20,227 based on 7 active listings.
As of July 25, 2026, the median asking price for a 2017 Cadillac CT6 in Illinois is $20,227, based on 7 active dealer listings tracked by VinAssessment.
◷ Updated July 25, 2026 ▤ 7 active dealer listings, refreshed daily Methodology →
Typical: $17,448–$22,770 — the middle half of 7 asking prices
Why the wide range? Price depends mostly on configuration and mileage — see below. This spread covers the middle 96% of asking prices: we exclude the cheapest and priciest 2% (payment-priced ads, typos, salvage) so outliers don't distort it.
What moves the price on a 2017 Cadillac CT6
The $17,448–$22,770 typical range isn't randomness — two factors explain most of it:
Asking prices run about $32,156 at 15K–30K miles and fall to $17,200 over 105K miles — roughly $1,700 for every 10,000 miles.
The Premium Luxury typically asks $19,437, while the Platinum asks $24,549 — same year, same market.
Find your mileage and trim in the configurator below.
Configure the exact car
Modelled from 44 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2017 Cadillac CT6: a fair price for your mileage
A 2017 Cadillac CT6 sheds roughly $1,700 for every 10,000 miles. Find your mileage below.
Fair price by mileage and trim
| Mileage | All listings | Luxury | Premium Luxury | Platinum |
|---|---|---|---|---|
| 15K–30K miles | $32,156 | — | $35,999 | — |
| 30K–45K miles | $28,987 | — | — | — |
| 45K–60K miles | $25,430 | $23,202 | — | — |
| 60K–75K miles | $21,639 | $22,280 | $21,497 | — |
| 75K–90K miles | $20,420 | $19,919 | $20,374 | $25,564 |
| 90K–105K miles | $18,398 | $19,196 | $18,292 | — |
| Over 105K miles | $17,200 | $15,945 | $17,446 | $21,207 |
Medians of live asking prices per band and version; “—” means fewer than 3 matching listings. National data.
Fair price by mileage — all versions combined
| Mileage ⓘ | Based on ⓘ | Fair price ⓘ | Typical range ⓘ |
|---|---|---|---|
| 15K–30K miles | 8 listings | $32,156 | $29K–$37K |
| 30K–45K miles | 5 listings | $28,987 | $25K–$29K |
| 45K–60K miles | 9 listings | $25,430 | $22K–$28K |
| 60K–75K miles | 12 listings | $21,639 | $19K–$24K |
| 75K–90K miles | 18 listings | $20,420 | $19K–$23K |
| 90K–105K miles | 13 listings | $18,398 | $16K–$21K |
| Over 105K miles | 34 listings | $17,200 | $15K–$19K |
Same trim and condition assumed — mileage is the biggest lever after configuration. National data; Illinois prices track it closely.
2017 Cadillac CT6: price by trim
| Trim | Based on ⓘ | Median price ⓘ | Typical range ⓘ | Where it sits ⓘ |
|---|---|---|---|---|
| Luxury | 44 listings | $19,995 | $18K–$23K | |
| Premium Luxury | 33 listings | $19,437 | $17K–$24K | |
| Platinum | 11 listings | $24,549 | $22K–$26K | |
| 20T RWD | 6 listings | $23,562 | $16K–$28K | |
| Standard | 5 listings | $20,646 | $19K–$24K |
Based on a small number of listings per trim — medians are indicative, not definitive. National data; Illinois prices track it closely.
Price history
Median asking price by month — national · shaded band is the typical range (25th–75th percentile)
The median listing price for a 2017 Cadillac CT6 is $20,345 (July 2026) — down 5.4% from $21,498 in August 2025.
Monthly price table
| Month | Median price | Typical range | Vehicles listed |
|---|---|---|---|
| July 2026 | $20,345 | $18K–$25K | 121 |
| June 2026 | $20,485 | $17K–$24K | 153 |
| May 2026 | $20,499 | $18K–$25K | 127 |
| April 2026 | $20,344 | $17K–$24K | 138 |
| March 2026 | $19,992 | $17K–$23K | 171 |
| February 2026 | $19,997 | $17K–$22K | 146 |
| January 2026 | $19,985 | $17K–$23K | 151 |
| December 2025 | $19,500 | $17K–$22K | 131 |
| November 2025 | $20,000 | $17K–$23K | 82 |
| October 2025 | $20,488 | $18K–$24K | 90 |
| September 2025 | $21,997 | $18K–$25K | 83 |
| August 2025 | $21,498 | $19K–$25K | 82 |
2017 Cadillac CT6 inventory across the U.S.
Keep exploring CT6 prices
2017 Cadillac CT6 · $20,964 typical · 7 listingsOther Cadillac CT6 years
Live 2017 Cadillac CT6 listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2016–2018 Cadillac CT6 listings on VehiSales →.
More 2017 Cadillac prices
Frequently asked questions
Why do 2017 Cadillac CT6 prices range from $15,803 to $29,621 in Illinois?
The spread comes down to configuration and mileage: higher-mileage, base-configuration examples sit near the low end, while low-mileage and premium configurations reach the top. Half of all listings fall between $17,448 and $22,770 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2017 Cadillac CT6?
Expect roughly $1,700 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $5,100 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
Do Cadillac CT6 prices in Illinois differ from the rest of the country?
Yes. The average in Illinois is $20,964, which is $501 below the national average of $21,465. Local supply, demand and transport costs all play a part.
How many 2017 Cadillac CT6 are for sale in Illinois right now?
7 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 7 active listings for this vehicle across dealer sites nationwide, updated every day. Average and median are computed from real asking prices on live listings. We exclude the top and bottom 2% of prices to remove data errors, salvage titles, and monthly-payment figures posted as if they were sale prices. Prices reflect dealer asking prices — not final sale prices — and exclude taxes, fees, and incentives. Trim and mileage move the price more than any other factor; see the breakdowns above.
Want the original factory equipment and MSRP behind a specific car? See the factory window sticker for this CT6 →
Shopping for this car?
Check individual VINs before you buy — decode the exact trim and mileage, see every active listing, and how each price compares to the local market.