2020 Gmc Sierra prices in the U.S.
The median pre-owned asking price for a 2020 Gmc Sierra in the U.S. is $35,988 based on 2,612 pre-owned listings (of 2,644 total).
As of July 25, 2026, the median asking price for a used 2020 Gmc Sierra in the U.S. is $35,988, based on 2,612 active dealer listings tracked by VinAssessment.
◷ Updated July 25, 2026 ▤ 2,644 active dealer listings, refreshed daily Methodology →
Typical: $30,990–$41,990 — the middle half of 2,644 asking prices
Why the wide range? Price depends mostly on configuration and mileage — see below. This spread covers the middle 96% of asking prices: we exclude the cheapest and priciest 2% (payment-priced ads, typos, salvage) so outliers don't distort it.
What moves the price on a 2020 Gmc Sierra
The $30,990–$41,990 typical range isn't randomness — three factors explain most of it:
The same car typically asks $28,999 in Connecticut but $51,495 in New Mexico.
The SLE typically asks $29,495, while the Denali asks $43,098 — same year, same market.
Asking prices run about $40,952 under 15K miles and fall to $30,900 over 105K miles — roughly $1,000 for every 10,000 miles.
Find your mileage and trim in the configurator below.
Configure the exact car
Modelled from 849 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2020 Gmc Sierra: a fair price for your mileage
A 2020 Gmc Sierra sheds roughly $1,000 for every 10,000 miles. Find your mileage below.
Fair price by mileage and trim
| Mileage | All listings | Denali | SLT | AT4 | Elevation | SLE |
|---|---|---|---|---|---|---|
| Under 15K miles | $40,952 | $44,872 | $42,500 | $34,804 | — | — |
| 15K–30K miles | $44,204 | $58,849 | $43,950 | $52,438 | $34,090 | $35,489 |
| 30K–45K miles | $42,995 | $54,634 | $40,114 | $43,580 | $37,843 | $35,978 |
| 45K–60K miles | $40,538 | $44,998 | $38,656 | $41,520 | $35,000 | $36,348 |
| 60K–75K miles | $38,579 | $41,542 | $36,995 | $40,005 | $32,430 | $33,695 |
| 75K–90K miles | $36,506 | $39,500 | $34,999 | $38,882 | $31,708 | $30,348 |
| 90K–105K miles | $34,500 | $45,000 | $33,510 | $35,980 | $30,055 | $28,900 |
| Over 105K miles | $30,900 | $39,948 | $29,924 | $32,995 | $26,635 | $24,736 |
Medians of live asking prices per band and version; “—” means fewer than 3 matching listings. National data.
Fair price by mileage — all versions combined
| Mileage ⓘ | Based on ⓘ | Fair price ⓘ | Typical range ⓘ |
|---|---|---|---|
| Under 15K miles | 25 listings | $40,952 | $36K–$49K |
| 15K–30K miles | 55 listings | $44,204 | $40K–$52K |
| 30K–45K miles | 133 listings | $42,995 | $39K–$55K |
| 45K–60K miles | 263 listings | $40,538 | $38K–$46K |
| 60K–75K miles | 378 listings | $38,579 | $35K–$42K |
| 75K–90K miles | 452 listings | $36,506 | $33K–$40K |
| 90K–105K miles | 462 listings | $34,500 | $31K–$39K |
| Over 105K miles | 870 listings | $30,900 | $27K–$36K |
Same trim and condition assumed — mileage is the biggest lever after configuration.
2020 Gmc Sierra: price by trim
| Trim | Based on ⓘ | Median price ⓘ | Typical range ⓘ | Where it sits ⓘ |
|---|---|---|---|---|
| Denali | 849 listings | $43,098 | $37K–$53K | |
| SLT | 700 listings | $34,213 | $30K–$38K | |
| AT4 | 517 listings | $37,199 | $33K–$41K | |
| Elevation | 315 listings | $30,707 | $28K–$33K | |
| SLE | 159 listings | $29,495 | $26K–$34K |
Price history
Median asking price by month · shaded band is the typical range (25th–75th percentile)
The median listing price for a 2020 Gmc Sierra is $35,898 (July 2026), unchanged from March 2026.
Monthly price table
| Month | Median price | Typical range | Vehicles listed |
|---|---|---|---|
| July 2026 | $35,898 | $30K–$44K | 501 |
| June 2026 | $36,333 | $30K–$43K | 339 |
| May 2026 | $36,244 | $30K–$43K | 74 |
| April 2026 | $34,945 | $30K–$43K | 90 |
| March 2026 | $35,995 | $32K–$43K | 83 |
2020 Gmc Sierra prices by state
Listed this year counts every 2020 Gmc Sierra first listed in 2026 (sold and active), with currently active cars as a floor. Typical price is the median of each car's latest asking price — or the average of active listings where this-year data is thin.
Keep exploring Sierra prices
2020 Gmc Sierra · $37,541 typical · 2,644 listingsOther Gmc Sierra years
Live 2020 Gmc Sierra listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2019–2021 Gmc Sierra listings on VehiSales →.
More 2020 Gmc prices
Frequently asked questions
Why do 2020 Gmc Sierra prices range from $22,120 to $60,205?
The spread comes down to configuration and mileage: higher-mileage, base-configuration examples sit near the low end, while low-mileage and premium configurations reach the top. Half of all listings fall between $30,990 and $41,990 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2020 Gmc Sierra?
Expect roughly $1,000 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $3,000 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
How many 2020 Gmc Sierra are for sale right now?
2,644 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 2,644 active listings for this vehicle across dealer sites nationwide, updated every day. Average and median are computed from real asking prices on live listings. We exclude the top and bottom 2% of prices to remove data errors, salvage titles, and monthly-payment figures posted as if they were sale prices. Prices reflect dealer asking prices — not final sale prices — and exclude taxes, fees, and incentives. Trim and mileage move the price more than any other factor; see the breakdowns above.
Want the original factory equipment and MSRP behind a specific car? See the factory window sticker for this Sierra →
Shopping for this car?
Check individual VINs before you buy — decode the exact trim and mileage, see every active listing, and how each price compares to the local market.