2018 Gmc Sierra prices in Tennessee
The median pre-owned asking price for a 2018 Gmc Sierra in Tennessee is $27,294 based on 59 active listings.
As of July 26, 2026, the median asking price for a used 2018 Gmc Sierra in Tennessee is $27,294, based on 59 active dealer listings tracked by VinAssessment.
◷ Updated July 26, 2026 ▤ 59 active dealer listings, refreshed daily Methodology →
Typical: $23,698–$30,852 — the middle half of 59 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 Sierra
The $23,698–$30,852 typical range isn't randomness — two factors explain most of it:
The SLE typically asks $23,990, while the Denali asks $33,495 — same year, same market.
Asking prices run about $31,780 under 15K miles and fall to $24,989 over 105K miles — roughly $600 for every 10,000 miles.
Find your mileage and trim in the configurator below.
Configure the exact car
Modelled from 1,101 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2018 Gmc Sierra: a fair price for your mileage
A 2018 Gmc Sierra sheds roughly $600 for every 10,000 miles. Find your mileage below.
Fair price by mileage and trim
| Mileage | All listings | SLT | Denali | SLE |
|---|---|---|---|---|
| Under 15K miles | $31,780 | $32,653 | $40,782 | — |
| 15K–30K miles | $37,564 | $34,706 | $44,900 | $32,999 |
| 30K–45K miles | $36,566 | $36,584 | $39,092 | $28,950 |
| 45K–60K miles | $34,008 | $34,842 | $38,934 | $29,138 |
| 60K–75K miles | $33,474 | $33,175 | $36,298 | $26,495 |
| 75K–90K miles | $30,542 | $30,236 | $33,247 | $25,647 |
| 90K–105K miles | $29,813 | $29,658 | $31,988 | $23,997 |
| Over 105K miles | $24,989 | $24,904 | $29,968 | $19,995 |
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 ⓘ |
|---|---|---|---|
| Under 15K miles | 17 listings | $31,780 | $28K–$38K |
| 15K–30K miles | 16 listings | $37,564 | $33K–$44K |
| 30K–45K miles | 42 listings | $36,566 | $30K–$40K |
| 45K–60K miles | 96 listings | $34,008 | $29K–$37K |
| 60K–75K miles | 189 listings | $33,474 | $30K–$36K |
| 75K–90K miles | 280 listings | $30,542 | $28K–$33K |
| 90K–105K miles | 334 listings | $29,813 | $27K–$32K |
| Over 105K miles | 1,054 listings | $24,989 | $21K–$28K |
Same trim and condition assumed — mileage is the biggest lever after configuration. National data; Tennessee prices track it closely.
2018 Gmc Sierra: price by trim
| Trim | Based on ⓘ | Median price ⓘ | Typical range ⓘ | Where it sits ⓘ |
|---|---|---|---|---|
| SLT | 1,101 listings | $27,800 | $24K–$31K | |
| Denali | 520 listings | $33,495 | $29K–$41K | |
| SLE | 216 listings | $23,990 | $20K–$27K |
National data; Tennessee 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 2018 Gmc Sierra is $28,218 (July 2026) — up 13.0% from $24,969 in March 2026.
Monthly price table
| Month | Median price | Typical range | Vehicles listed |
|---|---|---|---|
| July 2026 | $28,218 | $23K–$33K | 416 |
| June 2026 | $28,092 | $23K–$34K | 312 |
| May 2026 | $25,944 | $22K–$34K | 92 |
| April 2026 | $25,999 | $22K–$32K | 114 |
| March 2026 | $24,969 | $22K–$32K | 108 |
2018 Gmc Sierra inventory across the U.S.
Keep exploring Sierra prices
2018 Gmc Sierra · $28,499 typical · 59 listingsOther Gmc Sierra years
Live 2018 Gmc Sierra listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2017–2019 Gmc Sierra listings on VehiSales →.
More 2018 Gmc prices
Frequently asked questions
Why do 2018 Gmc Sierra prices range from $14,976 to $47,082 in Tennessee?
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 $23,698 and $30,852 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2018 Gmc Sierra?
Expect roughly $600 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $1,800 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
Do Gmc Sierra prices in Tennessee differ from the rest of the country?
Yes. The average in Tennessee is $28,499, which is $344 below the national average of $28,843. Local supply, demand and transport costs all play a part.
How many 2018 Gmc Sierra are for sale in Tennessee right now?
59 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 59 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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