$591 lower median
2018 Ford F-150
$22,908Median asking price · 193 qualifying listings
Middle 50%$18,900–$27,402
Find listings on VehiSales ↗Actual XLT listing photo; individual equipment may differ.
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2018 GMC C6 prices in Illinois
$22,603
Median asking price
6 active listings · Updated November 4, 2026
Price your exact car
Illinois price overview
Typical asking price range
$21,176 – $23,867 All 6 listings · Middle 50% of asking pricesMedian asking price
$22,603Trim, mileage and condition change what a comparable vehicle costs.
As of November 4, 2026, the median asking price for a 2018 GMC C6 in Illinois is $22,603, based on 6 active dealer listings tracked by VinAssessment.
Behind the price
Price range & market sample
The median asking price for a 2018 GMC C6 in Illinois is $22,603 based on 6 active listings.
6 active dealer listings
Snapshot November 4, 2026 · refreshed daily
30-day asking price change: +$1,416.
Typical: $21,176–$23,867 — the middle half of 6 asking prices
Median $22,603
$20K low
$24K high
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% to reduce the influence of extreme values. This does not verify title status or guarantee that every erroneous listing is excluded.
$22,603
Pre-owned median (6)
100,201
Average mileage
≈ national
vs national average
What moves the price
Mileage
Asking prices run about $25,256 at 45K–60K miles and fall to $19,990 over 105K miles — roughly $900 for every 10,000 miles. These are different vehicles; trim, condition and equipment also vary.
Observed spread: up to $5,266About these price differences
The $21,176–$23,867 typical range isn't randomness — one factor explains most of it:
Biggest factor in these observed spreads: Mileage. These groups contain different vehicles.
Find your mileage and trim in the configurator below.
Configure the exact car
Choose a state and trim once to update the connected price tables and charts for a 2018 GMC C6. Mileage adjusts the estimate only.
The configurator starts with United States prices for all trims. Select a state to explore its estimates; the report heading and overview above describe the page's state.
Total miles the car has already driven, as shown on its odometer.
mi
Estimated asking price · All trims
$21,998
$20,050
–
$24,262
55 listings · Nationwide
ⓘ This is a modelled estimate based on current listings and market data. Actual prices may vary.
Estimate assumptions
at typical mileage, nationwide
Modelled from 55 real asking prices, adjusted for mileage and location. An illustrative estimate from mixed listing groups, not matched vehicles. Not a formal appraisal.
Live 2018 GMC C6 listings, priced by VIN
Compared with all listings
All-listings median $22,603
2018 GMC C6
Trim not specified
$19,767
VIN 1GTG6DEN2J1265510
−$2,836 · vs all-listings median
2018 GMC C6
Trim not specified
$19,990
VIN 1GTG6DEN5J1189541
−$2,613 · vs all-listings median
2018 GMC C6
Trim not specified
$19,995
VIN 1GTG6DEN3J1328131
−$2,608 · vs all-listings median
View 9 more priced VINs
- Trim not specified VIN 1GTG6DEN5J1279353 $19,999 −$2,604 vs median
- Trim not specified VIN 1GTG6DEN1J1142796 $19,610 −$2,993 vs median
- Trim not specified VIN 1GTG6DEN6J1205732 $20,133 −$2,470 vs median
- Trim not specified VIN 1GTG6DEN5J1231545 $18,500 −$4,103 vs median
- Trim not specified VIN 1GTG6DEN1J1318469 $21,900 −$703 vs median
- Trim not specified VIN 1GTG6DEN2J1303107 $21,500 −$1,103 vs median
- Trim not specified VIN 1GTG6DEN1J1174101 $22,248 −$355 vs median
- Trim not specified VIN 1GTG6DEN8J1243415 $22,344 −$259 vs median
- Trim not specified VIN 1GTG6DEN7J1225469 $24,448 +$1,845 vs median
Price differences are not deal ratings. Compare equipment, mileage and vehicle history before judging a price.
Every VIN links to a full market report: decode, active listings and the local price band.
A little comparison goes a long way
About this comparison ↓What else could you drive?
Compare 2018 GMC C6 with other models from the same year. Choose the trims that matter to you.
As of November 3, 2026, among same-year alternatives to the 2018 GMC C6 in this catalog, the 2018 Ram 1500 has the lowest median asking price ($19,325, 59 listings with photos) and the 2018 Toyota Tundra the highest ($31,500, 9 listings).
Comparison catalog · Snapshot November 3, 2026, 05:00 UTC · Only listings with photos. This sample is separate from the price overview above and its figures differ.
Your comparison starting point
2018 GMC C6
All trims · Illinois
The price overview above is this page’s reference figure. The comparison below uses its own catalog sample: 5 listings with photos, catalog median $23,499 (the baseline for the “lower/higher” badges).
Middle 50%: $20,999–$23,990
Photo: Medium Conventional - 97.5 In. BBC · 86,199 mi · view VIN
Explore the alternatives
$496 higher median
2018 Chevrolet Silverado
$23,995Median asking price · 168 qualifying listings
Middle 50%$19,586–$28,738
Find listings on VehiSales ↗Actual LT listing photo; individual equipment may differ.
$5,500 higher median
2018 Nissan Titan
$28,999Median asking price · 5 qualifying listings
Middle 50%$25,412–$29,622
Find listings on VehiSales ↗Actual XD PRO-4X listing photo; individual equipment may differ.
$4,174 lower median
2018 Ram 1500
$19,325Median asking price · 59 qualifying listings
Middle 50%$16,968–$22,847
Find listings on VehiSales ↗Actual Laramie listing photo; individual equipment may differ.
$8,001 higher median
2018 Toyota Tundra
$31,500Median asking price · 9 qualifying listings
Middle 50%$23,907–$35,372
Find listings on VehiSales ↗Actual SR5 listing photo; individual equipment may differ.
No alternatives have a lower median in this selection. Broaden your filters or turn off “Lower median price only”.
Compare prices side by side
| Model / trim | Median | Middle 50% | Listings |
|---|---|---|---|
| 2018 GMC C6 All trims | see price overview above | $20,999–$23,990 | 5 |
| 2018 Ford F-150 All trims | $22,908 | $18,900–$27,402 | 193 |
| 2018 Chevrolet Silverado All trims | $23,995 | $19,586–$28,738 | 168 |
| 2018 Nissan Titan All trims | $28,999 | $25,412–$29,622 | 5 |
| 2018 Ram 1500 All trims | $19,325 | $16,968–$22,847 | 59 |
| 2018 Toyota Tundra All trims | $31,500 | $23,907–$35,372 | 9 |
What these prices mean
Only catalog listings with photos are included. Trim names do not verify equivalent equipment. Prices are asking prices, not completed sales. Alternatives share the body style and class of the source model; the nearest model years are used when the same year has too few listings. Price differences are not a valuation adjustment or guaranteed savings.
Snapshot: November 3, 2026, 05:00 UTC. 0 source listings excluded by statistical price screening; this does not verify that every deposit or payment ad has been removed.
VehiSales opens in a new tab with the model, year and known mileage range. Confirm trim, fuel, drivetrain, condition and location on VehiSales; its live inventory may differ.
2018 GMC C6: a fair price for your mileage
Mileage means the miles recorded on the odometer. Compare asking prices in your mileage band, then select a trim — the equipment version — to narrow the comparison where data is available.
Across the national mileage bands, the overall difference is roughly $900 per 10,000 miles. These are different vehicles, not depreciation of the same car.
Region · trim United States · All trims
Active listings 55
Median asking price $21,998
Mileage means the total miles on the odometer. Each point shows the median asking price for a mileage band; shaded areas show the middle 50% of prices.
Swipe the chart horizontally to see every mileage band.
Counts cover the selected region and trim, including listings without usable mileage. Thin mileage bands and rare or unknown trims may be omitted from the chart.
View the full national mileage price table
| Mileage ⓘ | Based on ⓘ | Fair price ⓘ | Typical range ⓘ |
|---|---|---|---|
| 45K–60K miles | 6 listings | $25,256 | $25K–$26K |
| 60K–75K miles | 6 listings | $24,225 | $24K–$24K |
| 75K–90K miles | 10 listings | $23,789 | $23K–$24K |
| 90K–105K miles | 9 listings | $21,500 | $21K–$22K |
| Over 105K miles | 20 listings | $19,990 | $20K–$20K |
United States — all states. These bands combine different trims, conditions and listing histories. They do not hold trim or condition constant. National data; the mix of vehicles in Illinois may differ.
Understand the differences
2018 GMC C6: VIN configurations and specifications
Multiple VIN patterns can share the same trim. Compare their recorded equipment, then open a specification page for the full details.
Where these specifications come from
Specifications combine decoded VIN data, including NHTSA vPIC , with inventory records. If decoding does not identify a trim, a recorded inventory trim may be shown. VIN patterns do not confirm every installed option.
Counts describe observed VINs in our database, not factory production totals. Prices are median asking prices from qualifying U.S. listings, not original MSRP. Check the vehicle’s build sheet for exact equipment.
FACTORY REFERENCE
2018 GMC C6 factory brochure
Model-year reference for features and equipment. Actual VIN equipment may differ.
No verified factory brochure is currently listed for this exact model year.
Need equipment for a specific vehicle? Look up its factory window sticker →
Price trend
View Illinois price trend · all trims
Average price is down $468 since August 6.
Average asking price (USD) · Illinois · all trims. Hover, tap or focus a point for its date and price.
Chart scale: $19,618–$23,459. On narrow screens, scroll the chart sideways to see the full period.
Daily average price table
| Date | Average asking price (USD) |
|---|---|
| November 4, 2026 | $22,410 |
| November 3, 2026 | $22,475 |
| November 2, 2026 | $22,419 |
| November 1, 2026 | $22,022 |
| October 31, 2026 | $22,764 |
| October 30, 2026 | $22,865 |
| October 29, 2026 | $22,833 |
| October 28, 2026 | $23,004 |
| October 27, 2026 | $23,087 |
| October 26, 2026 | $23,004 |
| October 25, 2026 | $23,087 |
| October 24, 2026 | $23,004 |
| October 23, 2026 | $23,004 |
| October 22, 2026 | $22,738 |
| October 21, 2026 | $22,841 |
| October 20, 2026 | $22,841 |
| October 19, 2026 | $22,924 |
| October 18, 2026 | $22,738 |
| October 17, 2026 | $22,924 |
| October 16, 2026 | $21,987 |
| October 15, 2026 | $21,987 |
| October 14, 2026 | $22,124 |
| October 13, 2026 | $20,994 |
| October 12, 2026 | $20,994 |
| October 11, 2026 | $20,994 |
| October 10, 2026 | $20,994 |
| October 9, 2026 | $20,994 |
| October 8, 2026 | $20,994 |
| October 7, 2026 | $20,994 |
| October 6, 2026 | $20,994 |
| October 5, 2026 | $20,994 |
| October 4, 2026 | $20,994 |
| October 3, 2026 | $20,994 |
| October 2, 2026 | $20,994 |
| October 1, 2026 | $20,994 |
| September 30, 2026 | $20,994 |
| September 29, 2026 | $20,994 |
| September 28, 2026 | $20,994 |
| September 27, 2026 | $20,994 |
| September 26, 2026 | $20,994 |
| September 25, 2026 | $19,990 |
| September 23, 2026 | $21,999 |
| September 22, 2026 | $21,999 |
| September 21, 2026 | $21,999 |
| September 20, 2026 | $21,999 |
| September 19, 2026 | $21,999 |
| September 18, 2026 | $21,999 |
| September 17, 2026 | $21,999 |
| September 16, 2026 | $21,999 |
| September 15, 2026 | $21,999 |
| August 27, 2026 | $22,289 |
| August 26, 2026 | $22,289 |
| August 25, 2026 | $22,289 |
| August 24, 2026 | $22,289 |
| August 23, 2026 | $22,289 |
| August 22, 2026 | $21,268 |
| August 21, 2026 | $21,268 |
| August 20, 2026 | $21,268 |
| August 19, 2026 | $21,268 |
| August 18, 2026 | $21,326 |
| August 17, 2026 | $21,268 |
| August 16, 2026 | $21,268 |
| August 15, 2026 | $22,302 |
| August 14, 2026 | $22,302 |
| August 13, 2026 | $21,954 |
| August 12, 2026 | $21,954 |
| August 11, 2026 | $22,004 |
| August 10, 2026 | $22,368 |
| August 9, 2026 | $22,849 |
| August 8, 2026 | $22,878 |
| August 7, 2026 | $22,878 |
| August 6, 2026 | $22,878 |
2018 GMC C6 inventory across the U.S.
See how asking prices vary across states. Looking for a 2018 GMC C6 for sale near you? Open your state's price guide to compare its market, then follow the local listings link to browse available vehicles.
United States · all trims · snapshot November 4, 2026. Explore state markets below. Prices and counts cover all trims in each state; the full comparison table remains available below the map.
View the U.S. inventory map
What does this map show?
The numbers are active listings, not prices. Badges mark the 2 busiest mapped states to keep the map readable; other states can also have listings.
Hover over a state or focus it with your keyboard for details. Click a linked state or its number to open that state's price page.
State details will appear here. On a phone, tap a linked state to open its prices; use the full table for easier browsing.
Scroll the map sideways on smaller screens. Numbers stay large enough to read.
Most active listings
Other states with active listings
No active listings or insufficient data
Alaska and Hawaii are not drawn on this map. Where qualifying data is available, they appear in the full state table. Grey does not necessarily mean no cars are for sale.
MEET THE REST OF THE LINEUP
More 2018 GMC prices
Something else catch your eye? Explore other 2018 GMC models before you decide.
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GMC Acadia
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GMC Terrain
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GMC Yukon XL
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GMC Canyon
Explore this model →Prices shown for other models are average asking prices in the national snapshot. Photos are representative; trim and equipment vary.
What would a 2018 GMC C6 cost per month?
Estimate the monthly payment on a $21,998 vehicle. Move the numbers to match your own loan.
10% down
7.0% is an illustrative starting rate — use your own lender quote.
Loan term
Estimated monthly payment
$392
per month
60 months · 7.0% APR · $2,200 down
Amount financed
$19,798
Total interest
$3,722
Estimate only. Excludes tax, title, registration and dealer fees, and assumes a fixed-rate loan with equal monthly payments. Your actual rate depends on your credit and lender.
Before you buy
A few important steps can help you buy with confidence.
- Check title and accident history
- Arrange an independent inspection
- Review factory equipment
- Check recalls by VIN
Frequently asked questions
Why do 2018 GMC C6 prices range from $20,091 to $24,245 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 $21,176 and $23,867 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2018 GMC C6?
Across the lowest- and highest-mileage groups, asking prices differ by roughly $900 per 10,000 miles. These groups contain different vehicles: this is not a same-trim adjustment or a forecast for one car. Compare the mileage and trim tables, then check condition, equipment and vehicle history.
Do GMC C6 prices in Illinois differ from the rest of the country?
Not much — Illinois prices track the national average of $22,461 almost exactly.
How many 2018 GMC C6 are for sale in Illinois right now?
6 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
Is this the trade-in value or private-party value of my 2018 GMC C6?
These figures describe dealer asking prices, not trade-in offers, private-party sale values or completed sale prices. Use them to compare advertised vehicles. To find out what a buyer or dealer would pay for your car, request an offer that takes its mileage, condition, equipment and history into account.
How we calculate these prices
We track 6 active listings for this vehicle across dealer sites in Illinois, 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 reduce the influence of extreme values. This does not verify title status or guarantee that every erroneous listing is excluded. 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? Pull the original window sticker by VIN →
Own a 2018 GMC C6? See what it's worth →
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