Used 2021 GMC Sierra HD Price in the US
A used 2021 GMC Sierra HD in the US typically lists for $47,668–$56,224, with a median asking price of $52,147 across 12 active US dealer listings (as of 2026-08-30). The cheapest one listed right now is $39,860, a 2021 Sle in El Reno, OK — below 95% of the market, so expect an older model year, a base trim or high mileage.
Browse by model year
cheapest per year- All years
- 2026 · from $47,930
- 2025 · from $25,000
- 2024 · from $27,999
- 2023 · from $24,999
- 2022 · from $16,980
- 2021 · from $44,995
- 2020 · from $29,977
- 2019 · from $13,995
- 2018 · from $28,990
- 2017 · from $18,245
- 2016 · from $33,972
- 2015 · from $41,190
- 2013 · from $11,500
- 2012 · from $22,846
- 2011 · from $15,000
- 2009 · from $14,999
- 2005 · from $15,990
- 2001 · from $12,600
- 2000 · from $9,484
Cheapest 10 listed right now
ranked by price-
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$48,3402021 GMC Sierra HD Denali104,594 mi · Hermantown, MN · Kolar Chevrolet Buick GMCView listing → -
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$54,0002021 GMC Sierra HD Denali71,916 mi · Kansas City, MO · Cable Dahmer Buick GMC of Kansas CityView 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 2021 GMC Sierra HD asks $47,668–$56,224. Cars this far under usually carry an older model year, a base trim or high mileage.
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10 pinnedFAQ
How much does a used 2021 GMC Sierra HD cost?
A used 2021 GMC Sierra HD in the US typically lists for $47,668 to $56,224, with a median asking price of $52,147 across 12 active US dealer listings. Nine in ten are priced between $42,684 and $59,913 (as of 2026-08-30, source: UnderMarket Cars).
Is $52,000 a good price for a used 2021 GMC Sierra HD?
That sits at about the market median ($52,147) for a used 2021 GMC Sierra HD. Under $47,668 puts you in the cheapest quarter of active US listings and under $42,684 in the cheapest 5%; above $59,913 is the priciest 5% (as of 2026-08-30).
What is the cheapest used 2021 GMC Sierra HD for sale right now?
$39,860 — a 2021 GMC Sierra HD Sle in El Reno, OK, $12,287 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 2021 GMC Sierra HD 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.