Used 2021 GMC Sierra HD Price in the US
A used 2021 GMC Sierra HD in the US lists for $59,971 — the median of 1 active US dealer listing (as of 2026-10-15). The cheapest one listed right now is $59,971, a 2021 Denali in Marysville, WA.
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$59,9712021 GMC Sierra HD Denali45,313 mi · Marysville, WA · Kendall Chevrolet of MarysvilleView listing →
FAQ
How much does a used 2021 GMC Sierra HD cost?
The median asking price of a used 2021 GMC Sierra HD in the US is $59,971, across 1 active US dealer listing (as of 2026-10-15, source: UnderMarket Cars).
What is the cheapest used 2021 GMC Sierra HD for sale right now?
$59,971 — a 2021 GMC Sierra HD Denali in Marysville, WA (as of 2026-10-15).
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?
The listing data behind UnderMarket Cars is rebuilt from live US dealer inventory every few hours, and this used 2021 GMC Sierra HD page is regenerated from it when it is requested. The figures on this page are from 2026-10-15.
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Prices updated 2026-10-15. Data covers active dealer listings across the USA.