Used 2020 GMC Sierra Price in the US
A used 2020 GMC Sierra in the US typically lists for $30,653–$41,950, with a median asking price of $35,797 across 2,700 active US dealer listings (as of 2026-08-30). The cheapest one listed right now is $11,900, a 2020 Fleet Base in San Antonio, TX — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $30,653 – $41,950
- Median
- $35,797
- Cheapest 5%
- under $24,352
- Cheapest listed now
- $11,900
Browse by model year
cheapest per year- All years
- 2026 · from $30,995
- 2025 · from $29,659
- 2024 · from $24,984
- 2023 · from $20,999
- 2022 · from $15,495
- 2021 · from $12,900
- 2020 · from $9,611
- 2019 · from $11,900
- 2018 · from $8,766
- 2017 · from $4,019
- 2016 · from $5,900
- 2015 · from $4,094
- 2014 · from $3,988
- 2013 · from $4,995
- 2012 · from $2,824
- 2011 · from $2,950
- 2010 · from $2,488
- 2009 · from $1,500
- 2008 · from $2,010
- 2007 · from $1,900
- 2006 · from $2,398
- 2005 · from $2,995
- 2004 · from $2,800
- 2003 · from $1,500
- 2002 · from $3,625
- 2001 · from $1,995
- 2000 · from $1,500
Cheapest 10 listed right now
ranked by price-
$11,9002020 GMC Sierra Fleet Base121,842 mi · San Antonio, TX · Wrays Auto Sales and MechanicsView listing → -
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$15,1292020 GMC Sierra Fleet Base118,867 mi · Bloomington, IL · Auto Net Broker IncView listing → -
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$15,9952020 GMC Sierra Fleet Base217,658 mi · Monroeville, AL · Wright Auto Sales,Inc.View 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 Sierra asks $30,653–$41,950. 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 Sierra cost?
A used 2020 GMC Sierra in the US typically lists for $30,653 to $41,950, with a median asking price of $35,797 across 2,700 active US dealer listings. Nine in ten are priced between $24,352 and $56,311 (as of 2026-08-30, source: UnderMarket Cars).
Is $36,000 a good price for a used 2020 GMC Sierra?
That sits at about the market median ($35,797) for a used 2020 GMC Sierra. Under $30,653 puts you in the cheapest quarter of active US listings and under $24,352 in the cheapest 5%; above $56,311 is the priciest 5% (as of 2026-08-30).
What is the cheapest used 2020 GMC Sierra for sale right now?
$11,900 — a 2020 GMC Sierra Fleet Base in San Antonio, TX, $23,897 under the median (as of 2026-08-30).
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 Sierra price page at least twice a day. The data date shown on this page is 2026-08-30.
Explore more
Prices updated 2026-08-30. Data covers active dealer listings across the USA.