2018 Gmc Heavy Conventional prices in the U.S.
The median pre-owned asking price for a 2018 Gmc Heavy Conventional in the U.S. is $22,990 based on 61 pre-owned listings (of 62 total).
As of July 25, 2026, the median asking price for a used 2018 Gmc Heavy Conventional in the U.S. is $22,990, based on 61 active dealer listings tracked by VinAssessment.
◷ Updated July 25, 2026 ▤ 62 active dealer listings, refreshed daily Methodology →
Typical: $21,559–$25,436 — the middle half of 62 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 2018 Gmc Heavy Conventional
The $21,559–$25,436 typical range isn't randomness — one factor explains most of it:
Asking prices run about $26,457 at 60K–75K miles and fall to $19,575 over 105K miles — roughly $1,500 for every 10,000 miles.
Find your mileage and trim in the configurator below.
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Modelled from 62 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2018 Gmc Heavy Conventional: a fair price for your mileage
A 2018 Gmc Heavy Conventional sheds roughly $1,500 for every 10,000 miles. Find your mileage below.
| Mileage ⓘ | Based on ⓘ | Fair price ⓘ | Typical range ⓘ |
|---|---|---|---|
| 60K–75K miles | 10 listings | $26,457 | $23K–$27K |
| 75K–90K miles | 15 listings | $24,892 | $23K–$26K |
| 90K–105K miles | 13 listings | $23,495 | $22K–$25K |
| Over 105K miles | 18 listings | $19,575 | $19K–$22K |
Same trim and condition assumed — mileage is the biggest lever after configuration.
Trim-level pricing isn't reliable enough for this model yet — mileage and configuration explain most of the spread above.
Price trend
Average price is down $868 since June 11.
2018 Gmc Heavy Conventional prices by state
| State | Typical price | Listed this year | Active now |
|---|---|---|---|
| Pennsylvania | $22,393 | 5 | 5 Shop 2017–2019 nearby → |
Listed this year counts every 2018 Gmc Heavy Conventional 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.
Keep exploring Heavy Conventional prices
2018 Gmc Heavy Conventional · $23,177 typical · 62 listingsOther Gmc Heavy Conventional years
Live 2018 Gmc Heavy Conventional listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2017–2019 Gmc Heavy Conventional listings on VehiSales →.
More 2018 Gmc prices
Frequently asked questions
Why do 2018 Gmc Heavy Conventional prices range from $16,342 to $29,502?
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 $21,559 and $25,436 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2018 Gmc Heavy Conventional?
Expect roughly $1,500 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $4,500 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
How many 2018 Gmc Heavy Conventional are for sale right now?
62 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 62 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.
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