2020 Gmc Terrain prices in Washington
The median asking price for a 2020 Gmc Terrain in Washington is $17,995 based on 9 active listings.
As of July 26, 2026, the median asking price for a 2020 Gmc Terrain in Washington is $17,995, based on 9 active dealer listings tracked by VinAssessment.
◷ Updated July 26, 2026 ▤ 9 active dealer listings, refreshed daily Methodology →
Typical: $16,238–$19,302 — the middle half of 9 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 2020 Gmc Terrain
The $16,238–$19,302 typical range isn't randomness — two factors explain most of it:
Asking prices run about $22,445 under 15K miles and fall to $14,526 over 105K miles — roughly $800 for every 10,000 miles.
The SLT typically asks $17,402, while the Denali asks $22,412 — same year, same market.
Find your mileage and trim in the configurator below.
Configure the exact car
Modelled from 412 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2020 Gmc Terrain: a fair price for your mileage
A 2020 Gmc Terrain sheds roughly $800 for every 10,000 miles. Find your mileage below.
Fair price by mileage and trim
| Mileage | All listings | SLT | SLE | Denali |
|---|---|---|---|---|
| Under 15K miles | $22,445 | $18,599 | $18,976 | $24,635 |
| 15K–30K miles | $23,280 | $24,075 | $21,752 | — |
| 30K–45K miles | $21,454 | $22,174 | $20,537 | $25,313 |
| 45K–60K miles | $20,482 | $20,912 | $19,509 | $24,087 |
| 60K–75K miles | $19,390 | $19,911 | $18,520 | $22,992 |
| 75K–90K miles | $18,083 | $18,091 | $17,311 | $21,426 |
| 90K–105K miles | $16,982 | $16,860 | $16,405 | $20,599 |
| Over 105K miles | $14,526 | $14,426 | $14,526 | $18,844 |
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 | 27 listings | $22,445 | $17K–$25K |
| 15K–30K miles | 17 listings | $23,280 | $21K–$24K |
| 30K–45K miles | 60 listings | $21,454 | $20K–$24K |
| 45K–60K miles | 136 listings | $20,482 | $19K–$23K |
| 60K–75K miles | 173 listings | $19,390 | $18K–$21K |
| 75K–90K miles | 174 listings | $18,083 | $17K–$20K |
| 90K–105K miles | 152 listings | $16,982 | $16K–$18K |
| Over 105K miles | 224 listings | $14,526 | $13K–$16K |
Same trim and condition assumed — mileage is the biggest lever after configuration. National data; Washington prices track it closely.
2020 Gmc Terrain: price by trim
| Trim | Based on ⓘ | Median price ⓘ | Typical range ⓘ | Where it sits ⓘ |
|---|---|---|---|---|
| SLT | 412 listings | $17,402 | $15K–$20K | |
| SLE | 388 listings | $17,813 | $16K–$19K | |
| Denali | 167 listings | $22,412 | $20K–$24K |
National data; Washington 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 2020 Gmc Terrain is $18,294 (July 2026) — down 7.9% from $19,856 in August 2025.
Monthly price table
| Month | Median price | Typical range | Vehicles listed |
|---|---|---|---|
| July 2026 | $18,294 | $16K–$20K | 1,180 |
| June 2026 | $18,340 | $16K–$20K | 1,255 |
| May 2026 | $18,534 | $16K–$21K | 1,267 |
| April 2026 | $18,395 | $16K–$21K | 1,088 |
| March 2026 | $17,998 | $16K–$20K | 1,322 |
| February 2026 | $17,731 | $16K–$20K | 1,236 |
| January 2026 | $17,518 | $16K–$20K | 1,168 |
| December 2025 | $17,911 | $16K–$20K | 876 |
| November 2025 | $18,489 | $16K–$21K | 678 |
| October 2025 | $18,978 | $17K–$21K | 690 |
| September 2025 | $19,950 | $18K–$22K | 636 |
| August 2025 | $19,856 | $18K–$22K | 632 |
2020 Gmc Terrain inventory across the U.S.
Keep exploring Terrain prices
2020 Gmc Terrain · $18,298 typical · 9 listingsOther Gmc Terrain years
Live 2020 Gmc Terrain listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2019–2021 Gmc Terrain listings on VehiSales →.
More 2020 Gmc prices
Frequently asked questions
Why do 2020 Gmc Terrain prices range from $14,545 to $23,070 in Washington?
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 $16,238 and $19,302 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2020 Gmc Terrain?
Expect roughly $800 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $2,400 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
Do Gmc Terrain prices in Washington differ from the rest of the country?
Not much — Washington prices track the national average of $18,368 almost exactly.
How many 2020 Gmc Terrain are for sale in Washington right now?
9 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 9 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? Look up the original Monroney sticker for a 2020 Gmc →
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.