Used 2020 GMC Sierra HD Price in the US
A used 2020 GMC Sierra HD in the US typically lists for $46,633–$50,745, with a median asking price of $49,873 across 6 active US dealer listings (as of 2026-10-15). The cheapest one listed right now is $37,950, a 2020 Base in Eads, TN — below 95% of the market, so expect high mileage, a base trim or a branded title — check the vehicle history.
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$50,9952020 GMC Sierra HD AT443,967 mi · Williston, ND · Red Rock Auto of WillistonView 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 HD asks $46,633–$50,745. Cars this far under: expect high mileage, a base trim or a branded title — check the vehicle history.
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6 pinnedFAQ
How much does a used 2020 GMC Sierra HD cost?
A used 2020 GMC Sierra HD in the US typically lists for $46,633 to $50,745, with a median asking price of $49,873 across 6 active US dealer listings. Nine in ten are priced between $39,861 and $55,422 (as of 2026-10-15, source: UnderMarket Cars).
Is $50,000 a good price for a used 2020 GMC Sierra HD?
That sits at about the market median ($49,873) for a used 2020 GMC Sierra HD. Under $46,633 puts you in the cheapest quarter of active US listings and under $39,861 in the cheapest 5%; above $55,422 is the priciest 5% (as of 2026-10-15).
What is the cheapest used 2020 GMC Sierra HD for sale right now?
$37,950 — a 2020 GMC Sierra HD Base in Eads, TN, $11,923 under the median (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 2020 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.