Used 2020 GMC Terrain prices, November 2026
A used 2020 GMC Terrain is listed for about $14,822–$19,731 at US dealers (middle 50% of 1,438 listings), with a median of $17,023 at 86,109 miles, as of Nov 7, 2026. That's 1.1% lower than on Oct 25, 2026 ($17,212).
Updated · By CarWhere Research · Source: active US dealer listings (licensed vehicle-data providers) · About this data
Median asking price
$17,023
Average $17,227
Median miles
86,109
Average 88,783
For sale now
1,438
46 certified (3.2%)
Median days listed
49
How much is a used 2020 GMC Terrain?
A used 2020 GMC Terrain has a median asking price of $17,023 (average $17,227), with the middle half of listings between $14,822 and $19,731. That sits between the 2019 ($15,212) and the 2022 ($20,998).
Are used 2020 GMC Terrain prices going down?
Yes. The median asking price for a used 2020 GMC Terrain moved from $17,212 on Oct 25, 2026 to $17,023 on Nov 7, 2026 (-1.1%).
Dealer asking price vs. trade-in vs. private sale
The prices on this page are what US dealers are asking for a 2020 GMC Terrain today, before negotiation, taxes and fees. A dealer's trade-in offer for the same car is usually well below its asking price, because the dealer has to recondition it, carry it and still make a margin. A private sale typically lands between the two. To estimate your own car, try the trade-in calculator or the used car value tool.
Used 2020 GMC Terrain listings by trim
The SLT is the most common 2020 Terrain on dealer lots (43.7% of listings). Click a count for those listings.
| Trim | For sale now | Share (%) |
|---|---|---|
| SLT | 628 | 43.7% |
| SLE | 565 | 39.3% |
| Denali | 245 | 17% |
Where are the most used 2020 GMC Terrains for sale?
Texas has the most (126 listings), followed by Ohio, Michigan, Florida. More local supply means more cars to compare and more room to negotiate.
| State | For sale now | Share of US listings (%) |
|---|---|---|
| Texas | 126 | 8.8% |
| Ohio | 108 | 7.5% |
| Michigan | 103 | 7.2% |
| Florida | 73 | 5.1% |
| Illinois | 70 | 4.9% |
| New York | 70 | 4.9% |
| Indiana | 62 | 4.3% |
| Pennsylvania | 60 | 4.2% |
| Missouri | 51 | 3.5% |
| Wisconsin | 42 | 2.9% |
Other Terrain model years
| Model year | Median price (USD) | Median miles | For sale now |
|---|---|---|---|
| 2026 | $27,949 | 18,922 | 2,666 |
| 2024 | $23,497 | 41,803 | 3,602 |
| 2023 | $23,684 | 41,935 | 2,008 |
| 2022 | $20,998 | 61,239 | 1,307 |
| 2020 | $17,023 | 86,109 | 1,438 |
| 2019 | $15,212 | 97,235 | 1,180 |
Frequently asked questions
How much is a 2020 GMC Terrain?
A used 2020 GMC Terrain has a median asking price of $17,023 (average $17,227), with the middle half of listings between $14,822 and $19,731. That sits between the 2019 ($15,212) and the 2022 ($20,998). Based on 1,438 listings on Nov 7, 2026.
What is a 2020 GMC Terrain worth?
At a dealer, most 2020 GMC Terrains are priced $14,822–$19,731; the median listing has 86,109 miles. Lower miles, a higher trim and certified pre-owned status push a car toward the top of that range. Expect a trade-in offer below the dealer asking range, and a private sale to land in between.
Are used 2020 GMC Terrain prices going down?
Yes. The median asking price for a used 2020 GMC Terrain moved from $17,212 on Oct 25, 2026 to $17,023 on Nov 7, 2026 (-1.1%).
How many used 2020 GMC Terrains are for sale?
1,438 were listed at US dealers on Nov 7, 2026, 46 (3.2%) certified pre-owned. The most common trim is the SLT (628 listings).
How long does a used 2020 GMC Terrain take to sell?
Half of the 2020 GMC Terrains listed today have been on the market 49 days or less.
Where are the most used 2020 GMC Terrains for sale?
Texas has the most (126 listings), followed by Ohio, Michigan, Florida. More local supply means more cars to compare and more room to negotiate.
About this data
- Period
- Listings active on Nov 7, 2026 (snapshot)
- Filter
- Used and certified 2020 GMC Terrain, all US states
- Counts
- 1,438 listings (46 certified pre-owned)
- Method
- Median, average and 25th–75th percentile asking price, odometer miles and days listed across active used and certified pre-owned 2020 GMC Terrain listings at US dealers. Change compares today's median with the same model year's median in our Oct 25, 2026 snapshot. Asking prices are what dealers list, not what buyers paid.
- Source
- Active used and certified listings at US dealers from licensed vehicle-data providers. Only aggregates are kept: counts, medians, averages and percentiles.
- Updates
- Refreshed from a new market snapshot on a regular schedule; last updated .
- Data
- Download JSON (the aggregates on this page)