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2018 GMC C6 prices in the U.S.
$22,817
Median pre-owned asking price
39 pre-owned listings · Updated September 10, 2026
Price your exact car
National price overview
Typical asking price range
$21,168 – $24,180 All 39 listings · Middle 50% of asking pricesMedian asking price
$22,817Trim, mileage and condition change what a comparable vehicle costs.
As of September 10, 2026, the median asking price for a used 2018 GMC C6 in the U.S. is $22,817, based on 39 active dealer listings tracked by VinAssessment.
Price range, sample and methodology details
The median pre-owned asking price for a 2018 GMC C6 in the U.S. is $22,817 based on 39 active listings.
Based on 39 active dealer listings, refreshed daily.
30-day asking price change: −$1,039.
Typical: $21,168–$24,180 — the middle half of 39 asking prices
Median $22,817
$15K low
$27K 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.
$22,817
Pre-owned median (39)
95,941
Average mileage
What moves the price
Mileage
Asking prices run about $25,382 at 60K–75K miles and fall to $19,995 over 105K miles — roughly $1,200 for every 10,000 miles. These are different vehicles; trim, condition and equipment also vary.
Observed spread: up to $5,387About these price differences
The $21,168–$24,180 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.
Total miles the car has already driven, as shown on its odometer.
mi
Estimated asking price · All trims
$22,817
$21,168
–
$24,180
39 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 39 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 $22,817
2018 GMC C6
Trim not specified
$17,995
VIN 1GTG6DEN7J1132113
−$4,822 · vs all-listings median
2018 GMC C6
Trim not specified
$19,995
VIN 1GTG6DENXJ1234540
−$2,822 · vs all-listings median
2018 GMC C6
Trim not specified
$19,995
VIN 1GTG6DEN3J1328131
−$2,822 · vs all-listings median
View 5 more priced VINs
- Trim not specified VIN 1GTG6DEN5J1115648 $20,194 −$2,623 vs median
- Trim not specified VIN 1GTG6DEN6J1205732 $20,855 −$1,962 vs median
- Trim not specified VIN 1GTG6DEN1J1174101 $23,248 +$431 vs median
- Trim not specified VIN 1GTG6DEN1J1231509 $24,354 +$1,537 vs median
- Trim not specified VIN 1GTG6DEN7J1225469 $25,319 +$2,502 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.
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 $1,200 per 10,000 miles. These are different vehicles, not depreciation of the same car.
Region · trim United States · All trims
Active listings 39
Median asking price $22,817
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 ⓘ |
|---|---|---|---|
| 60K–75K miles | 6 listings | $25,382 | $24K–$26K |
| 75K–90K miles | 9 listings | $23,889 | $23K–$25K |
| 90K–105K miles | 10 listings | $22,808 | $22K–$23K |
| Over 105K miles | 12 listings | $19,995 | $19K–$22K |
United States — all states. These bands combine different trims, conditions and listing histories. They do not hold trim or condition constant.
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 national price trend · all trims
Average price is down $531 since June 12.
Average asking price (USD) · national · all trims. Hover, tap or focus a point for its date and price.
Chart scale: $21,603–$26,004. On narrow screens, scroll the chart sideways to see the full period.
Daily average price table
| Date | Average asking price (USD) |
|---|---|
| September 10, 2026 | $22,575 |
| September 9, 2026 | $22,298 |
| September 8, 2026 | $22,544 |
| September 7, 2026 | $22,364 |
| September 6, 2026 | $22,441 |
| September 5, 2026 | $22,378 |
| September 4, 2026 | $22,322 |
| September 3, 2026 | $22,442 |
| September 2, 2026 | $22,424 |
| September 1, 2026 | $22,029 |
| August 31, 2026 | $22,145 |
| August 30, 2026 | $22,541 |
| August 29, 2026 | $22,554 |
| August 28, 2026 | $22,881 |
| August 27, 2026 | $22,927 |
| August 26, 2026 | $23,001 |
| August 25, 2026 | $23,128 |
| August 24, 2026 | $22,964 |
| August 23, 2026 | $22,877 |
| August 22, 2026 | $22,625 |
| August 21, 2026 | $22,760 |
| August 20, 2026 | $25,578 |
| August 19, 2026 | $25,466 |
| August 18, 2026 | $23,367 |
| August 17, 2026 | $23,401 |
| August 16, 2026 | $23,450 |
| August 15, 2026 | $23,635 |
| August 14, 2026 | $23,681 |
| August 13, 2026 | $23,586 |
| August 12, 2026 | $23,639 |
| August 11, 2026 | $23,614 |
| August 10, 2026 | $23,219 |
| August 9, 2026 | $23,249 |
| August 8, 2026 | $23,270 |
| August 7, 2026 | $23,197 |
| August 6, 2026 | $22,977 |
| August 5, 2026 | $22,850 |
| August 4, 2026 | $22,688 |
| August 3, 2026 | $22,666 |
| August 2, 2026 | $22,711 |
| August 1, 2026 | $22,391 |
| July 31, 2026 | $22,486 |
| July 30, 2026 | $22,814 |
| July 29, 2026 | $22,718 |
| July 28, 2026 | $22,499 |
| July 27, 2026 | $22,510 |
| July 26, 2026 | $23,235 |
| July 25, 2026 | $23,177 |
| July 24, 2026 | $23,137 |
| July 23, 2026 | $22,945 |
| July 22, 2026 | $22,976 |
| July 21, 2026 | $22,702 |
| July 20, 2026 | $22,769 |
| July 19, 2026 | $22,655 |
| July 18, 2026 | $22,606 |
| July 17, 2026 | $22,900 |
| July 16, 2026 | $22,900 |
| July 15, 2026 | $22,696 |
| July 14, 2026 | $22,690 |
| July 13, 2026 | $22,912 |
| July 12, 2026 | $22,851 |
| July 11, 2026 | $22,845 |
| July 10, 2026 | $22,322 |
| July 9, 2026 | $22,490 |
| July 8, 2026 | $22,480 |
| July 7, 2026 | $22,687 |
| July 6, 2026 | $22,866 |
| July 5, 2026 | $22,553 |
| July 4, 2026 | $22,468 |
| July 3, 2026 | $22,749 |
| July 2, 2026 | $22,607 |
| July 1, 2026 | $23,073 |
| June 30, 2026 | $22,799 |
| June 29, 2026 | $23,058 |
| June 28, 2026 | $23,297 |
| June 27, 2026 | $23,136 |
| June 26, 2026 | $23,107 |
| June 25, 2026 | $22,760 |
| June 24, 2026 | $22,931 |
| June 23, 2026 | $22,538 |
| June 22, 2026 | $23,113 |
| June 21, 2026 | $23,534 |
| June 20, 2026 | $23,235 |
| June 19, 2026 | $22,802 |
| June 18, 2026 | $22,409 |
| June 17, 2026 | $22,503 |
| June 16, 2026 | $22,708 |
| June 15, 2026 | $22,726 |
| June 14, 2026 | $22,898 |
| June 13, 2026 | $23,143 |
| June 12, 2026 | $23,106 |
2018 GMC C6 prices by state
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 September 10, 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 1 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.
View all states and prices
| State | Typical price | Listed this year | Active now |
|---|---|---|---|
| Ohio | $19,532 | 5 | 5 Shop 2017–2019 nearby → |
Listed this year counts every 2018 GMC C6 first listed in 2026 (sold and active), with currently active cars as a floor. Typical price is the median of each car's latest asking price — or the average of active listings where this-year data is thin.
MEET THE REST OF THE LINEUP
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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 $22,817 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
$407
per month
60 months · 7.0% APR · $2,282 down
Amount financed
$20,535
Total interest
$3,885
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 $14,906 to $27,178?
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 $21,168 and $24,180 — 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 $1,200 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.
How many 2018 GMC C6 are for sale right now?
39 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 39 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 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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