Used 2020 GMC Terrain Price in the US
A used 2020 GMC Terrain in the US typically lists for $15,288–$20,172, with a median asking price of $17,834 across 1,122 active US dealer listings (as of 2026-09-01). The cheapest one listed right now is $6,990, a 2020 Sle in Medford, NY — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $15,288 – $20,172
- Median
- $17,834
- Cheapest 5%
- under $11,969
- Cheapest listed now
- $6,990
Browse by model year
cheapest per year- All years
- 2027 · from $29,535
- 2026 · from $23,500
- 2025 · from $6,878
- 2024 · from $8,950
- 2023 · from $12,394
- 2022 · from $11,794
- 2021 · from $7,750
- 2020 · from $6,990
- 2019 · from $5,995
- 2018 · from $5,995
- 2017 · from $3,200
- 2016 · from $3,799
- 2015 · from $2,467
- 2014 · from $1,995
- 2013 · from $2,000
- 2012 · from $2,500
- 2011 · from $1,900
- 2010 · from $3,599
Cheapest 10 listed right now
ranked by price-
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$8,3992020 GMC Terrain Sle138,963 mi · Chesapeake, VA · Southern Buick GMC GreenbrierView listing → -
$8,9882020 GMC Terrain Denali225,977 mi · Hardinsburg, KY · Dan Powers Chevrolet GMCView listing →
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These are the bottom of the market, not the going rate — every one is priced below 95% of active listings. A typical used 2020 GMC Terrain asks $15,288–$20,172. Cars this far under usually carry an older model year, a base trim or high mileage.
Deals on the map
10 pinnedFAQ
How much does a used 2020 GMC Terrain cost?
A used 2020 GMC Terrain in the US typically lists for $15,288 to $20,172, with a median asking price of $17,834 across 1,122 active US dealer listings. Nine in ten are priced between $11,969 and $23,999 (as of 2026-09-01, source: UnderMarket Cars).
Is $18,000 a good price for a used 2020 GMC Terrain?
That sits at about the market median ($17,834) for a used 2020 GMC Terrain. Under $15,288 puts you in the cheapest quarter of active US listings and under $11,969 in the cheapest 5%; above $23,999 is the priciest 5% (as of 2026-09-01).
What is the cheapest used 2020 GMC Terrain for sale right now?
$6,990 — a 2020 GMC Terrain Sle in Medford, NY, $10,844 under the median (as of 2026-09-01).
Are these MSRP or real asking prices?
Real asking prices from active US dealer listings, deduplicated by VIN — not manufacturer MSRP. They already reflect dealer discounts, and they exclude tax, title, registration and dealer fees.
How often are prices updated?
UnderMarket Cars refreshes US dealer listings continuously and re-generates this used 2020 GMC Terrain price page at least twice a day. The data date shown on this page is 2026-09-01.
Explore more
Prices updated 2026-09-01. Data covers active dealer listings across the USA.